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TITLE:
Apache mod_proxy "date" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA26636

VERIFY ADVISORY:
http://secunia.com/advisories/26636/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Apache 2.0.x
http://secunia.com/product/73/
Apache 2.2.x
http://secunia.com/product/9633/

DESCRIPTION:
A vulnerability has been reported in the Apache mod_proxy module,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to the improper handling of date
headers within the "ap_proxy_date_canon()" function in proxy_util.c.
This can be exploited to cause a DoS by sending specially crafted
requests to the affected server.

Successful exploitation results in a crash if a threaded
Multi-Processing Module is used on servers where a reverse or forward
proxy is configured.

The vulnerability is reported in Apache 2.0.x versions 2.0.59 and
prior, and Apache 2.2.x versions 2.2.4 and prior.

SOLUTION:
The vulnerability is fixed in Apache 2.0.61-dev and Apache 2.2.6-dev.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://httpd.apache.org/security/vulnerabilities_20.html
http://httpd.apache.org/security/vulnerabilities_22.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
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clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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