Secunia Research: Lotus Notes ZIP File Handling Buffer Overflow

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                     Secunia Research 10/02/2006

           - Lotus Notes ZIP File 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 

* Lotus Notes 6.5.4

Other versions may also be affected.

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2) Severity 

Rating: Moderately Critical
Impact: System access
Where:  Remote

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3) Description of Vulnerability

Secunia Research has discovered a vulnerability in Lotus Notes, which
can be exploited by malicious people to compromise a user's system. 

The vulnerability is caused due to a boundary error in kvarcve.dll
when constructing the full pathname of a compressed file to check for
its existence before extracting it from a ZIP archive. This can be
exploited to cause a stack-based buffer overflow.

Successful exploitation allows execution of arbitrary code when the 
user extracts a compressed file with a long filename from within the
Notes attachment viewer.

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4) Solution 

Update to version 6.5.5. 

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5) Time Table 

03/08/2005 - Initial vendor notification.
03/08/2005 - Initial vendor response.
10/02/2006 - Public disclosure.

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6) Credits 

Discovered by Tan Chew Keong, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
candidate number CAN-2005-2618 for the vulnerability.

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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/2005-37/advisory/

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

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