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CHM Lib Multiple Buffer Overflow Vulnerabilities
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Secunia Advisory:
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SA17325
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Release Date:
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2005-10-26
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Last Update:
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2005-11-08
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Critical:
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Moderately critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | CHM Lib (chmlib) 0.x
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| | CVE reference: | CVE-2005-2659 (Secunia mirror)
CVE-2005-2930 (Secunia mirror)
CVE-2005-3318 (Secunia mirror)
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Description:
Some vulnerabilities have been reported in CHM Lib (chmlib), which potentially can be exploited by malicious people to compromise a user's system.
1) A boundary error exists in the "_chm_decompress_block()" function when reading input from a ".chm" file into a stack buffer. This can be exploited to cause a stack-based buffer overflow and may allow arbitrary code execution via a specially crafted ".chm" file.
The vulnerability has been reported in version 0.36 and prior.
2) A boundary error exists in the "_chm_find_in_PMGL()" function when reading input from a ".chm" file into a stack buffer. This can be exploited to cause a stack-based buffer overflow and may allow arbitrary code execution via a specially crafted ".chm" file.
3) An unspecified boundary error exists when performing LZX decompression. This may be exploited to cause a buffer overflow.
Vulnerability #2 and #3 has been reported in version 0.35.
Note: The vulnerabilities potentially affect other applications that use the library.
Solution:
Update to version 0.37.
http://morte.jedrea.com/~jedwin/projects/chmlib/
Provided and/or discovered by:
1) Sven Tantau
2) Discovered by anonymous and reported via iDEFENSE.
3) Palasik Sandor
Changelog:
2005-10-31: Added information of additional vulnerabilities. Updated "Description", "Original Advisory" and credit sections.
2005-11-07: Added CVE reference.
2005-11-08: Added CVE reference.
Original Advisory:
Sven Tantau:
http://www.sven-tantau.de/public_files/chmlib/chmlib_20051126.txt
iDEFENSE:
http://www.idefense.com/application/poi/display?id=332&type=vulnerabilities
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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2 Related Secunia Security Advisories
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1. CHMlib Page Block Length Memory Corruption Vulnerability
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2. CHM Lib "extract_chmLib" Directory Traversal Vulnerability
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