ed0e1e4d44
1979 changes to exploits/shellcodes Couchdb 1.5.0 - 'uuids' Denial of Service Apache CouchDB 1.5.0 - 'uuids' Denial of Service Beyond Remote 2.2.5.3 - Denial of Service (PoC) udisks2 2.8.0 - Denial of Service (PoC) Termite 3.4 - Denial of Service (PoC) SoftX FTP Client 3.3 - Denial of Service (PoC) Silverstripe 2.3.5 - Cross-Site Request Forgery / Open redirection SilverStripe CMS 2.3.5 - Cross-Site Request Forgery / Open Redirection Silverstripe CMS 3.0.2 - Multiple Vulnerabilities SilverStripe CMS 3.0.2 - Multiple Vulnerabilities Silverstripe CMS 2.4 - File Renaming Security Bypass SilverStripe CMS 2.4 - File Renaming Security Bypass Silverstripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities SilverStripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities Silverstripe CMS 2.4.7 - 'install.php' PHP Code Injection SilverStripe CMS 2.4.7 - 'install.php' PHP Code Injection Silverstripe Pixlr Image Editor - 'upload.php' Arbitrary File Upload SilverStripe CMS Pixlr Image Editor - 'upload.php' Arbitrary File Upload Silverstripe CMS 2.4.x - 'BackURL' Open Redirection SilverStripe CMS 2.4.x - 'BackURL' Open Redirection Silverstripe CMS - 'MemberLoginForm.php' Information Disclosure SilverStripe CMS - 'MemberLoginForm.php' Information Disclosure Silverstripe CMS - Multiple HTML Injection Vulnerabilities SilverStripe CMS - Multiple HTML Injection Vulnerabilities Apache CouchDB 1.7.0 and 2.x before 2.1.1 - Remote Privilege Escalation Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation Monstra CMS before 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (2) Monstra CMS < 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (1) Navigate CMS 2.8 - Cross-Site Scripting Collectric CMU 1.0 - 'lang' SQL injection Joomla! Component CW Article Attachments 1.0.6 - 'id' SQL Injection LG SuperSign EZ CMS 2.5 - Remote Code Execution MyBB Visual Editor 1.8.18 - Cross-Site Scripting Joomla! Component AMGallery 1.2.3 - 'filter_category_id' SQL Injection Joomla! Component Micro Deal Factory 2.4.0 - 'id' SQL Injection RICOH Aficio MP 301 Printer - Cross-Site Scripting Joomla! Component Auction Factory 4.5.5 - 'filter_order' SQL Injection RICOH MP C6003 Printer - Cross-Site Scripting Linux/ARM - Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (28 Bytes) Linux/ARM - sigaction() Based Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (52 Bytes)
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4.1 KiB
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95 lines
No EOL
4.1 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=798
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Android: Stack-buffer-overflow in /system/bin/sdcard
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There's an integer overflow issue in get_node_path_locked, which results in
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a buffer overflow. For all of the calling paths, this is going to overflow a
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stack buffer in the parent function:
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static ssize_t get_node_path_locked(struct node* node, char* buf, size_t bufsize) {
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const char* name;
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size_t namelen;
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if (node->graft_path) {
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name = node->graft_path;
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namelen = node->graft_pathlen;
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} else if (node->actual_name) {
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name = node->actual_name;
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namelen = node->namelen;
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} else {
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name = node->name;
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namelen = node->namelen;
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}
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// when bufsize == namelen + 1
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if (bufsize < namelen + 1) {
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return -1;
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}
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ssize_t pathlen = 0;
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if (node->parent && node->graft_path == NULL) {
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// bufsize - namelen - 2 overflows to SIZE_MAX
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pathlen = get_node_path_locked(node->parent, buf, bufsize - namelen - 2);
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if (pathlen < 0) {
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return -1;
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}
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buf[pathlen++] = '/';
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}
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memcpy(buf + pathlen, name, namelen + 1); /* include trailing \0 */
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return pathlen + namelen;
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}
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This can be triggered by a malicious app creating a directory structure in
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/sdcard with a total path length longer than PATH_MAX, which can be achieved by
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creating a directory heirarchy starting with several directories with short
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names and later renaming these parent directories to have longer names. See the
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attached POC, which can be run from the 'untrusted_app' selinux domain.
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It appears that the overflow is close enough to the bottom of the stack that
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with a large overflow we can corrupt thread data that is used before the stack
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cookie is checked, suggesting that this issue is possibly exploitable despite
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the presence of stack cookies.
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(gdb) i r
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r0 0xb 11
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r1 0x1 1
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r2 0x41414199 1094795673
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r3 0x41414141 1094795585
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r4 0x80000000 2147483648
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r5 0x0 0
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r6 0xb6e40ec0 3068399296
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r7 0xb6cbe860 3066816608
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r8 0xb6e4930c 3068433164
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r9 0xb6e3c594 3068380564
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r10 0xbee4c9ac 3202664876
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r11 0xb6943180 3063165312
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r12 0xb6e3c908 3068381448
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sp 0xb6cbe7a0 0xb6cbe7a0
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lr 0xb6e1daad -1226712403
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pc 0xb6e06ade 0xb6e06ade <pthread_getspecific(pthread_key_t)+34>
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cpsr 0x80070030 -2147024848
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(gdb) x/10i $pc
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=> 0xb6e06ade <pthread_getspecific(pthread_key_t)+34>: ldr r4, [r2, #100] ; 0x64
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0xb6e06ae0 <pthread_getspecific(pthread_key_t)+36>: cmp r4, r1
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0xb6e06ae2 <pthread_getspecific(pthread_key_t)+38>: bne.n 0xb6e06aec <pthread_getspecific(pthread_key_t)+48>
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0xb6e06ae4 <pthread_getspecific(pthread_key_t)+40>: ldr r0, [r2, #104] ; 0x68
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0xb6e06ae6 <pthread_getspecific(pthread_key_t)+42>: pop {r4, pc}
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0xb6e06ae8 <pthread_getspecific(pthread_key_t)+44>: movs r0, #0
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0xb6e06aea <pthread_getspecific(pthread_key_t)+46>: pop {r4, pc}
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0xb6e06aec <pthread_getspecific(pthread_key_t)+48>: adds r0, #12
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0xb6e06aee <pthread_getspecific(pthread_key_t)+50>: add.w r12, r3, r0, lsl #3
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0xb6e06af2 <pthread_getspecific(pthread_key_t)+54>: movs r0, #0
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(gdb) bt
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#0 0xb6e06ade in pthread_getspecific (key=11) at bionic/libc/bionic/pthread_key.cpp:160
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#1 0xb6e1daac in je_tsd_wrapper_get () at external/jemalloc/include/jemalloc/internal/tsd.h:609
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#2 je_tsd_get () at external/jemalloc/include/jemalloc/internal/tsd.h:609
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#3 je_tsd_fetch () at external/jemalloc/include/jemalloc/internal/tsd.h:614
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#4 imalloc_body (usize=<synthetic pointer>, tsd=<synthetic pointer>, size=4) at external/jemalloc/src/jemalloc.c:1401
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#5 je_malloc (size=4) at external/jemalloc/src/jemalloc.c:1423
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#6 0xb6f3bb3e in handle_open (fuse=0xbee478c8, hdr=0xbee4c984, req=<optimized out>, handler=<optimized out>)
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at system/core/sdcard/sdcard.c:1193
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#7 0x41414140 in ?? ()
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/39921.zip |