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TITLE:
mod_ssl "SSLVerifyClient" Security Bypass Security Issue

SECUNIA ADVISORY ID:
SA16700

VERIFY ADVISORY:
http://secunia.com/advisories/16700/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
mod_ssl 2.x
http://secunia.com/product/252/

DESCRIPTION:
A security issue has been reported in mod_ssl, which potentially can
be exploited by malicious people to bypass certain security
restrictions.

The security issue is caused due to an error in enforcing
client-based certificate authentication ("SSLVerifyClient require")
in per-location context, if "SSLVerifyClient optional" was configured
in the global virtual host configuration. This may allow malicious
people to bypass client-based certificate authentication and gain
unauthorised access to certain web pages.

SOLUTION:
Update to version 2.8.24.
http://www.modssl.org/source/mod_ssl-2.8.24-1.3.33.tar.gz

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

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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:
http://secunia.com/secunia_security_advisories/

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


Please Note:
Secunia recommends that you verify all advisories you receive by
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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