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Insecure Library Loading
Moderately critical

mod_security POST Request Processing Off-By-One Vulnerability

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Release Date:  2004-03-17    Last Update:  2005-03-14    Views:  11,314

Secunia Advisory SA11138

Where:

From remote

Impact:

DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Evgeny Legerov has discovered a vulnerability in mod_security, which can be exploited by malicious people to cause a DoS (Denial-of-Service) and potentially compromise a vulnerable system.

The vulnerability is reportedly caused due to an off-by-one error within the handling of POST payloads when the "SecFilterScanPost" directive is enabled.

Successful exploitation will cause web server instances to crash but may potentially also allow execution of arbitrary code. However, this hasn't been confirmed.

The vulnerability has been reported in version 1.7.4 combined with the Apache 2.x branch.


Solution:
Update to version 1.7.5.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Evgeny Legerov, S-Quadra.

Original Advisory:
http://www.s-quadra.com/advisories/Adv-20040315.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: mod_security POST Request Processing Off-By-One Vulnerability

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