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Secunia Research 08/09/2005

- NOD32 Anti-Virus ARJ 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

NOD32 for Windows NT/2000/2003/XP Trial Version 2.5
(with nod32.002 version 1.033 build 1127)

Other 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 NOD32 Anti-Virus,
which potentially can be exploited by malicious people to compromise
a vulnerable system.

The vulnerability is caused due to an error in handling ARJ archives
containing compressed files with overly long filename. This can be
exploited to cause a heap-based buffer overflow when a specially
crafted ARJ archive is scanned.

Successful exploitation may allow arbitrary code execution, but
requires that archive scanning is enabled.

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4) Solution

Update to the latest version via online update.
(nod32.002 version 1.034 build 1132).

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5) Time Table

29/08/2005 - Initial vendor notification.
30/08/2005 - Initial vendor reply.
02/09/2005 - Fixed version available via online update.
08/09/2005 - Public disclosure.

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6) Credits

Discovered by Tan Chew Keong, Secunia Research.

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7) References

No references available.

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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/2005-40/advisory/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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