Secunia

Matteo Memelli has discovered a vulnerability in MDaemon, which can be exploited by malicious users to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the IMAP server when processing the "FETCH" command. This can be exploited to cause a stack-based buffer overflow via a specially crafted "FETCH" command containing an overly long section specification in a "BODY" data item.

Successful exploitation allows execution of arbitrary code, but requires valid user credentials.

The vulnerability is confirmed in version 9.6.4. Other versions may also be affected.

Solution
Update to version 9.6.5.
Further details available in Customer Area

Provided and/or discovered by
Matteo Memelli a.k.a. ryujin

Changelog
Further details available in Customer Area

Original Advisory
MDaemon release notes:
http://files.altn.com/MDaemon/Release/RelNotes_en.txt

Matteo Memelli:
http://www.be4mind.com/?q=node/256

Deep Links
Links available in Customer Area