4646.txt

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Rule:

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Sid:
4646

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Summary:
This event is generated when a remote attacker attempts to exploit a format string vulnerability against an IMAP server. In particular this event indicates that an exploit attempt has been made using the "search" function of an imap server.

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Impact:
Serious. A successful format string attack could result in the execution of arbitrary code with the same privileges as the user running the IMAP daemon.

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Detailed Information:
Some versions of the Courier IMAP daemon are vulnerable to format string exploits prior to and during authentication to the IMAP server.  A successful exploit attempt could result in the remote attacker gaining unauthorized root access to a vulnerable system.

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Affected Systems:
Courier IMAP server versions 1.6 though 3.0.2

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Attack Scenarios:
A remote attacker could use a publicly available script to exploit the vulnerability an gain control of the target host.

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Ease of Attack:
Simple. Exploit code is available.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Upgrade to the latest non-affected version of the software.

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Contributors:
Sourcefire Vulnerability Research Team
Matt Watchinski <[e-mail]>
Nigel Houghton <[e-mail]>

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Additional References:

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