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Apache mod_auth_shadow Module "require group" Incorrect Authentication
Secunia Advisory: SA17060
Release Date: 2005-10-05
Popularity: 7,810 views

Critical:
Less critical
Impact: Security Bypass
Where: From remote
Solution Status: Vendor Patch

Software:mod_auth_shadow 1.x (module for Apache)
mod_auth_shadow 2.x (module for Apache)

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CVE reference:CVE-2005-2963


Description:
David Herselman has reported a security issue in the mod_auth_shadow module for Apache, which potentially can be exploited by malicious people to bypass certain security restrictions.

The problem is that the mod_auth_shadow authentication scheme is automatically used when using the "require group" directive in a ".htaccess" file, which may be different than the intended HTTP authentication scheme.

Solution:
Update to version 1.5 or 2.1.
http://sourceforge.net/project/showfiles.php?group_id=11283

Provided and/or discovered by:
David Herselman

Original Advisory:
Debian:
http://www.debian.org/security/2005/dsa-844


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