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Secunia Research 14/09/2005
- AVIRA Antivirus ACE Archive Handling Buffer Overflow -
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Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9
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1) Affected Software
AVIRA Desktop for Windows version 1.00.00.68
with AVPACK32.DLL version 6.31.0.3.
Prior versions may also be affected.
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2) Severity
Rating: Highly Critical
Impact: System access
Where: Remote
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3) Description of Vulnerability
Secunia Research has discovered a vulnerability in AVIRA Desktop for
Windows antivirus, which can be exploited by malicious people to
compromise a vulnerable system.
The vulnerability is caused due to a boundary error when reading the
filename of a compressed file from an ACE archive. This can be
exploited to cause a stack-based buffer overflow when an ACE archive
containing a compressed file with an overly long filename is scanned.
Successful exploitation allows arbitrary code execution, but
requires that archive scanning is enabled.
The vulnerability is related to:
SA14359
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4) Solution
Update to the latest version via online update.
(AVPACK32.DLL version 6.31.1.7).
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5) Time Table
05/09/2005 - Initial vendor notification.
05/09/2005 - Initial vendor reply.
06/09/2005 - Vendor provides updated version for testing.
14/09/2005 - Public disclosure.
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6) Credits
Discovered by Tan Chew Keong, Secunia Research.
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7) References
AVIRA:
http://www.avira.com/en/news/avira_desktop_for_windows_patched_
against_vulnerability.html
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
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9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-43/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
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