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TITLE:
ACS Blog Login Check Security Bypass Vulnerability

SECUNIA ADVISORY ID:
SA15105

VERIFY ADVISORY:
http://secunia.com/advisories/15105/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
ACS Blog 1.x
http://secunia.com/product/4791/

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

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