6504.txt

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Rule: 

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Sid: 
6504

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Summary: 
This event is generated when an attempt is made to exploit a known vulnerability in Sophos Anti-Virus products. 

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Impact: 
Serious. Execution of code is possible.

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Detailed Information:
Sophos Anti-Virus fails to properly process Microsoft CAB files. A remote attacker may be able to leverage this vulnerability to execute code of their choosing on the target host or cause a denial of service (DoS) against the Sophos Anti-Virus process.

This is a heap overflow vulnerability and is caused by the mishandling of CAB files. If a CAB file contains an excessive amount of folder descriptions a static buffer could be overflowed giving an attacker the opportunity to execute code of their choosing on an affected host.

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Affected Systems:

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Attack Scenarios: 
An attacker can supply a malformed CAB file to be processed by Sophos Anti-Virus causing the overflow to occur.

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Ease of Attack: 
Simple

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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
Kevin Shivers <[e-mail]>
Nigel Houghton <[e-mail]>

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Additional References:

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