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)
40 lines
No EOL
2.6 KiB
Text
40 lines
No EOL
2.6 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=814
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The dec2lha library is the library responsible for decompressing LZH and LHA archives. The CSymLHA::get_header() routine has a trivial stack buffer overflow.
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.text:00023D91 31 C0 xor eax, eax
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...
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.text:00023DAE 8D 95 E4 FB FF+ lea edx, [ebp+var_41C]
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.text:00023DB4 89 D7 mov edi, edx
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.text:00023DC7 66 B9 00 01 mov cx, 100h
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.text:00023DCB F3 AB rep stosd
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We can see from this initialization that var_141C is a 1024 byte stack buffer, because 0x100 * sizeof(dword) = 1024. But later on in this routine:
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.text:0002442C 88 0C 10 mov [eax+edx], cl ; eax = &var_41C edx=index
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.text:0002442F 83 C2 01 add edx, 1 ; edx++
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...
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.text:00024408 81 FA 00 10 00+ cmp edx, 1000h ; if (index > 4096) ...
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.text:0002440E 0F 84 E9 02 00+ jz loc_246FD ; oob
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The index is checked to see if it's > 4096 bytes, this is incorrect. This is most likely a simple programmers error, bounds checking with the wrong size.
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This code is typically run with SYSTEM/root privileges, I'm using Symantec Scan Engine on Linux to reproduce this issue, but all platforms and products using this code (e.g. Symantec Mail Security) are likely affected.
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#0 0xf5606d95 in CSymLHA::get_header(SymLHA::_S_LzHeader*) () from libdec2lha.so
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#1 0xf5607af4 in CSymLHA::GetEntry(SymLHA::_S_LzHeader*) () from libdec2lha.so
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#2 0xf55e83d5 in CLHAEngine::ProcessChildren(IDecomposerEx*, IDecContainerObjectEx*, IDecEventSink*, unsigned short*, char*, CSymLHA*) () from libdec2lha.so
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#3 0xf55e8a8f in CLHAEngine::Process(IDecomposerEx*, IDecContainerObjectEx*, IDecEventSink*, unsigned short*, char*, bool*, bool*) () from libdec2lha.so
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#4 0xf5c137b5 in CDecomposer::DecProcess(IDecObject*, IDecEventSink*, IDecIOCB*, unsigned short*, char*) ()
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#5 0xf5c143cb in CDecomposer::Process(IDecObject*, IDecEventSink*, IDecIOCB*, unsigned short*, char*) ()
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(gdb) c
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Program received signal SIGSEGV, Segmentation fault.
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0x41414141 in ?? ()
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Because Symantec do not use -fstack-protector on Linux, exploitation is remarkably trivial. Exploitation is likely still possible on Windows, but may be more difficult as they do use /GS on that platform.
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This issue is remotely exploitable just by receiving an email, visiting a website, and so on.
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/40032.zip |