Rule: 

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Sid: 
100000135

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Summary: 
This event is generated when an attempt to exploit a format string attack 
against the GNU Mailutils imap4d server.

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Impact: 
A denial of service will occur, and it may be possible to execute arbitrary 
code with the privileges of the user running the imap server.

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Detailed Information:
The vulnerability is triggered when the request tag contains format string 
characters. This will cause the server to read and/or write at invalid memory 
locations, potentially allowing an attacker to execute arbitrary code.

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Affected Systems:
GNU Mailutils 0.5
GNU Mailutils 0.6

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Attack Scenarios: 
Publicly available scripts exist to exploit this vulnerability.

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Ease of Attack: 
Simple, exploit scripts exist.

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False Positives:
None known.

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False Negatives:
None Known

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Corrective Action: 
Upgrade to version 0.6.90 or higher.

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Contributors: 
Judy Novak <judy.novak@sourcefire.com>
Alex Kirk <alex.kirk@sourcefire.com>

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Additional References:

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