From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Oct 26 2009 - 17:11:10 CDT

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TITLE:
Pegasus Mail POP3 Error Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA37134

VERIFY ADVISORY:
http://secunia.com/advisories/37134/

DESCRIPTION:
Francis Provencher has discovered a vulnerability in Pegasus Mail,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to a boundary error in the processing
of POP3 responses. This can be exploited to cause a stack-based buffer
overflow via an overly long error response.

Successful exploitation may allow execution of arbitrary code, but
requires that the user is tricked into connecting to a malicious POP3
server.

The vulnerability is confirmed in version 4.41. Other versions may
also be affected.

SOLUTION:
Update to version 4.51, which mitigates the vulnerability via the
"/GS" flag. An exploitation attempt will still result in a process
termination.

Do not connect to untrusted POP3 servers.

PROVIDED AND/OR DISCOVERED BY:
Francis Provencher, Protek Research Lab

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