Rule

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Sid
24697

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Summary:
This event is generated when an attempt is made to exploit a known vulnerability in http server.

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Impact:
Denial of Service.   

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Detailed Information:
The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.

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Affected Systems:
apache http server 2.2.17
apache http server 2.2.18
apache http server 2.2.19
apache http server 2.2.20
apache http server 2.2.21

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Attack Scenarios:


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Ease of Attack:
Difficult.

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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.

Apply the appropriate vendor supplied patches.

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Contributors:
Sourcefire Vulnerability Research Team
This document was generated from data supplied by the National Vulnerability Database. A product of the National Institute of Standards and Technology.
For more information see http://nvd.nist.gov/

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Additional References:

NIST CVE-2012-0021:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0021
  
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