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Fetchmail Bounced Message Denial of Service Vulnerability
Secunia Advisory: SA18571
Release Date: 2006-01-23
Popularity: 7,917 views

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

Software:Fetchmail 6.x

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CVE reference:CVE-2006-0321


Description:
A vulnerability has been reported in Fetchmail, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to incorrect freeing of an invalid pointer when bouncing a message to the originator or to the local postmaster. This can be exploited to crash Fetchmail.

The vulnerability has been reported in versions 6.3.x prior to 6.3.2 and in release candidates 6.3.2-rc1, -rc2, and -rc3.

Solution:
Update to version 6.3.2 or later.
http://developer.berlios.de/project/showfiles.php?group_id=1824

NOTE: The vendor reports that fetchmail 6.2.x has reached end of life.

Provided and/or discovered by:
The vendor credits Nathaniel W. Turner.

Original Advisory:
http://fetchmail.berlios.de/fetchmail-SA-2006-01.txt


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