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Hexamail Server "USER" Buffer Overflow Vulnerability
Secunia Advisory: SA26666
Release Date: 2007-09-03
Last Update: 2007-09-04
Popularity: 4,070 views

Critical:
Moderately critical
Impact: DoS
System access
Where: From local network
Solution Status: Vendor Patch

Software:Hexamail Server 3.x

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CVE reference:CVE-2007-4646


Description:
rgod has reported a vulnerability in Hexamail Server, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within pop3server when processing POP3 "USER" commands. This can be exploited to cause a heap-based buffer overflow by sending a "USER" command with an overly long parameter to the affected server.

Successful exploitation may allow execution of arbitrary code.

The vulnerability is reported in version 3.0.0.001. Prior versions may also be affected.

Solution:
Update to 3.0.1.004.

Provided and/or discovered by:
rgod

Changelog:
2007-09-04: Added CVE reference.

Original Advisory:
http://retrogod.altervista.org/hexamail_bof.html

Other References:
http://milw0rm.com/exploits/4344


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