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Old 9th May 2011
J65nko J65nko is offline
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Default Critical hole in the Exim Mail server closed

From http://www.h-online.com/security/new...d-1239543.html

Quote:
A missing format specification in a logging function of the free Mail Transfer Agent Exim has been identified by the developers as offering an attacker a chance to execute arbitrary code on the server.

The particular line of code wrote a string directly to the logfile. An attacker could exploit this by adding particular formatting instructions into the DKIM information string in an incoming email which would allow them to inject their own code and run it with the rights of the mail server. Although no exploit is known to exist, the developers believe that an experienced attacker would not find an exploit hard to construct.
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