ACS Blog Login Check Security Bypass Vulnerability
Secunia Advisory: SA15105
Release Date: 2005-04-25
Last Update: 2005-05-02
Popularity: 5,265 views

Critical:
Moderately critical
Impact: Security Bypass
Where: From remote
Solution Status: Unpatched

Software:ACS Blog 1.x

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CVE reference:CVE-2005-1288


Description:
farhad koosha has reported a vulnerability in ACS Blog, which can be exploited by malicious people to bypass certain security restrictions.

The problem is that the "inc_login_check.asp" script insecurely determines if an administrator has been authenticated based on a certain cookie value. This can be exploited to bypass the authentication process by sending a specially crafted cookie.

The vulnerability has been reported in version 0.8, 1.0, 1.0.1, 1.0.2, 1.0.3, 1.1, 1.1.2 and 1.1.3. Other versions may also be affected.

Solution:
Edit the source code to ensure that users are properly authenticated.

Provided and/or discovered by:
farhad koosha

Changelog:
2005-05-02: Added CVE reference.


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