Date: 30 May 2007
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AA-2007.0033 AUSCERT Advisory
Multiple anti-virus vendor unpacking and decompression vulnerabilities
30 May 2007
AusCERT Advisory Summary
Product: Avira Antivir versions prior to 7.03.00.09
AVAST antivirus versions prior to 4.7.700
Panda Software Antivirus
Operating System: Windows
Impact: Execute Arbitrary Code/Commands
Denial of Service
CVE Names: CVE-2007-2846 CVE-2007-2845 CVE-2007-1670
Member content until: Wednesday, June 27 2007
Several Anti-virus software packages contain vulnerabilities in the
file decompression and unpacking functions.
The reported impact of these vulnerabilities ranges from denial of
service to the execution of arbitrary code:
o avast! versions prior to 4.7.700 are vulnerable to the execution
of arbitrary code when processing specially crafted .SIS
(CVE-2007-2846) and .CAB (CVE-2007-2845) files.
o Antivir versions prior to 7.03.00.09 are vulnerable to the
execution of arbitrary code when processing specially crafted
o Antivir versions prior to 7.03.00.09 are vulnerable to a denial
of service when processing specially crafted .TAR and UPX packed
o Antivir versions prior to 7.03.00.09 (CVE-2007-1671), avast!
versions prior to 4.7.700 (CVE-2007-1672) and Panda Software
Antivirus (CVE-2007-1670) are all vulnerable to a denial of
service when processing a specially crafted .ZOO archive.
According to information from the vendor and security researchers,
patches are available for these anti-virus products and are a
automatically applied during the update process. However, users and
administrators are urged to ensure they are running up to date
versions of these products.
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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