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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2.2 KiB
Text
40 lines
No EOL
2.2 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=763
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The LZMA specification says the following about the memory usage of decompression:
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"The size of the probability model counter arrays is calculated with the following formula: size_of_prob_arrays = 1846 + 768 * (1 << (lp + lc))"
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But that formula only holds true if you keep the parameters within the specified range, which the SDK gives as:
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lp - The number of literal pos bits (low bits of current position for literals).
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It can be in the range from 0 to 4. The default value is 0.
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lc - The number of literal context bits (high bits of previous literal).
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It can be in the range from 0 to 8. The default value is 3.
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If you set the parameters outside those ranges, then the rest of the assumptions don't hold and memory corruption can occur. Comodo do not attempt to keep these parameters in range, and lots of memory corruption can occur, the attached testcase should crash during an LZMA decode operation by overflowing a heap buffer.
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This vulnerability is obviously exploitable for remote code execution as NT AUTHORITY\SYSTEM.
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(438.dd4): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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unpack!CreateInstance+0x654bc:
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000007fe`f29890cc 66f3ab rep stos word ptr [rdi]
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0:010> r
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rax=0000000000000400 rbx=0000000000000000 rcx=000000007ffffe88
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rdx=0000000000000001 rsi=000000000b154588 rdi=000000000bbfc000
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rip=000007fef29890cc rsp=000000000d6cd2c0 rbp=0000000000000000
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r8=0000000000023c7c r9=000000000d6cd378 r10=0000000000000001
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r11=000000000b361000 r12=0000000000000001 r13=000000000b39c38c
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r14=0000000000000000 r15=000000000bbfaea4
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iopl=0 nv up ei ng nz na po nc
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cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010286
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unpack!CreateInstance+0x654bc:
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000007fe`f29890cc 66f3ab rep stos word ptr [rdi]
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This is trying to initialize the probabilities array, but overflowing the heap buffer allocated and running off a page boundary.
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/39602.zip |