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Insecure Library Loading
Highly critical

Apache HTTP Server Multiple Vulnerabilities

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Release Date:  2010-03-03    Last Update:  2010-03-12    Views:  17,588

Secunia Advisory SA38776

Where:

From remote

Impact:

Exposure of sensitive information, DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Some vulnerabilities have been reported in Apache HTTP Server, which can be exploited by malicious people to gain access to potentially sensitive information, cause a DoS (Denial of Service) and potentially compromise a vulnerable system.

1) The "ap_proxy_ajp_request()" function in modules/proxy/mod_proxy_ajp.c of the mod_proxy_ajp module returns the "HTTP_INTERNAL_SERVER_ERROR" error code when processing certain malformed requests. This can be exploited to put the backend server into an error state until the retry timeout expired by sending specially crafted requests.

2) The mod_isapi module unloads ISAPI modules before the request processing is complete, potentially leaving orphaned callback pointers behind. This can be exploited by sending a specially crafted request followed by a reset packet.

Successful exploitation may allow the execution of arbitrary code with SYSTEM privileges on Windows systems.

3) An error exists within the header handling when processing subrequests, which can lead to sensitive information from a request being handled by the wrong thread if a multi-threaded Multi-Processing Module (MPM) is used.

Vulnerabilities #1 and #3 are reported in version 2.2.0, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.2.8, 2.2.9, 2.2.11, 2.2.12, 2.2.13, and 2.2.14.


Solution:
Update to version 2.2.15.

Provided and/or discovered by:
1) The vendor credits Niku Toivola of Sulake Corporation.
2) Brett Gervasoni, SOS Labs.
3) Reported in a bug report by Philip Pickett

Original Advisory:
Apache:
http://httpd.apache.org/security/vulnerabilities_22.html
http://svn.apache.org/viewvc?view=revision&revision=917875
http://svn.apache.org/viewvc?view=revision&revision=917870
https://issues.apache.org/bugzilla/show_bug.cgi?id=48359

SOS Labs:
2) http://www.senseofsecurity.com.au/advisories/SOS-10-002

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: Apache HTTP Server Multiple Vulnerabilities

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