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Apache Two Denial of Service Vulnerabilities

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Release Date:  2009-09-03    Last Update:  2010-10-19    Views:  10,180

Secunia Advisory SA36549

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Two vulnerabilities have been reported in Apache, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) An error exists in mod_proxy_ftp when processing responses received from FTP servers. This can be exploited to trigger a NULL-pointer dereference and crash an Apache child process via a malformed EPSV response.

Successful exploitation requires that a threaded Multi-Processing Module is used and that the mod_proxy_ftp module is enabled.

The vulnerability is confirmed in Apache versions 2.0.63 and 2.2.13. Other versions may also be affected.

2) An error in the included APR-util library can be exploited to trigger hangs in the prefork and event MPMs on Solaris.

For more information see vulnerability #2 in:
SA36138

The vulnerability is reported in 2.2.x versions prior to 2.2.14.


Solution:
Apache 2.2.x:

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Evgeny Legerov

Original Advisory:
Apache Foundation:
http://httpd.apache.org/security/vulnerabilities_22.html
http://httpd.apache.org/security/vulnerabilities_20.html
http://www.apache.org/dist/httpd/CHANGES_2.0.64

Intevydis:
http://www.intevydis.com/blog/?p=59

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 Two Denial of Service Vulnerabilities

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