Rule:

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Sid:
2330

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Summary:
This event is generated when a remote user sends an overly long string 
to an IMAP server via the command AUTH. This may indicate an attempt to 
exploit a buffer overflow condition.

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Impact:
Serious. Possible remote execution of arbitrary code, which may lead to a remote root compromise.

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Detailed Information:
When a large amount of data is sent to a vulnerable IMAP server in the 
AUTHENTICATE command, a buffer overflow condition may occur. This can 
allow the attacker to execute arbitrary code, which may allow the 
attacker to gain root access to the compromised server.

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Affected Systems:
	IMAP servers

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Attack Scenarios:
An attacker can send a sufficiently long AUTHENTICATE command to the 
IMAP server, creating a buffer overflow condition. This can then allow 
the attacker to execute code of their choosing and possibly gain root 
access to the compromised server.

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Ease of Attack:
Simple. Exploits exist.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Apply the appropriate patches for your operating system.

Check the host for signs of compromise.

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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

Bugtraq
http://www.securityfocus.com/bid/8861

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