Ubuntu: 1482-3: ClamAV regression
Posted by Benjamin D. Thomas   
Ubuntu USN-1482-1 introduced a regression in ClamAV that could cause it to failto scan certain documents.
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Ubuntu Security Notice USN-1482-3
August 16, 2012

clamav regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04

Summary:

USN-1482-1 introduced a regression in ClamAV that could cause it to fail
to scan certain documents.

Software Description:
- clamav: Anti-virus utility for Unix

Details:

USN-1482-1 fixed vulnerabilities in ClamAV. The updated package could
fail to properly scan files in some situations.  This update fixes
the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that ClamAV incorrectly handled certain malformed TAR
 archives. A remote attacker could create a specially-crafted TAR file
 containing malware that could escape being detected. (CVE-2012-1457,
 CVE-2012-1459)
 
 It was discovered that ClamAV incorrectly handled certain malformed CHM
 files. A remote attacker could create a specially-crafted CHM file
 containing malware that could escape being detected. (CVE-2012-1458)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
  clamav                          0.97.5+dfsg-1ubuntu0.12.04.3
  libclamav6                      0.97.5+dfsg-1ubuntu0.12.04.3

Ubuntu 11.10:
  clamav                          0.97.5+dfsg-1ubuntu0.11.10.3
  libclamav6                      0.97.5+dfsg-1ubuntu0.11.10.3

Ubuntu 11.04:
  clamav                          0.97.5+dfsg-1ubuntu0.11.04.3
  libclamav6                      0.97.5+dfsg-1ubuntu0.11.04.3

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1482-3
  http://www.ubuntu.com/usn/usn-1482-1
  https://launchpad.net/bugs/1015405

Package Information:
  https://launchpad.net/ubuntu/+source/clamav/0.97.5+dfsg-1ubuntu0.12.04.3
  https://launchpad.net/ubuntu/+source/clamav/0.97.5+dfsg-1ubuntu0.11.10.3
  https://launchpad.net/ubuntu/+source/clamav/0.97.5+dfsg-1ubuntu0.11.04.3