[IVIZ-08-011] ClamAV lzh unpacking segmentation fault

2008-12-14T00:00:00
ID SECURITYVULNS:DOC:21020
Type securityvulns
Reporter Securityvulns
Modified 2008-12-14T00:00:00

Description


[ iViZ Security Advisory 08-011 10/12/2008 ]

iViZ Techno Solutions Pvt. Ltd. http://www.ivizsecurity.com


  • Title: ClamAV lzh unpacking segmentation fault
  • Date: 10/12/2008
  • Software: ClamAV 0.93.3 and prior

--[ Synopsis:

Clamav uses an external unpacker, which can be deterministically crashed,
when processing corrupted LZH files.

--[ Affected Software:

  • ClamAV 0.93.3 and prior

--[ Non Affected Software:

  • ClamAV 0.94 and newer

--[ Impact:

Remote DoS, possibly remote code execution.

--[ Vendor response:

  • "Support for external unpackers has been dropped in 0.94 for security issues".

--[ Credits:

This vulnerability was discovered by Security Researcher
Jonathan Brossard from iViZ Techno Solutions Pvt. Ltd.

--[ Disclosure timeline:

  • First private disclosure to vendor on October 14th 2008
  • First vendor reply on October 15th 2008 : issue fixed.

--[ Reference:

http://www.ivizsecurity.com/security-advisory.html