TITLE:
Claroline Single Sign-On System Predictable Cookie

SECUNIA ADVISORY ID:
SA18588

VERIFY ADVISORY:
http://secunia.com/advisories/18588/

CRITICAL:
Less critical

IMPACT:
Hijacking, Security Bypass

WHERE:
>From remote

SOFTWARE:
Claroline 1.x
http://secunia.com/product/4607/

DESCRIPTION:
karmaguedon has reported a vulnerability in Claroline, which
potentially can be exploited by malicious people to bypass certain
security restrictions.

The vulnerability is caused due to the "claro_init_local.inc.php"
script generating a predictable value based on the current time for
the authentication cookie used by the internal SSO (Single Sign-On)
system. This may be exploited to gain access to an application using
Claroline's internal SSO system.

Successful exploitation requires that the SSO functionality is
enabled (not enabled by default).

The vulnerability has been reported in version 1.7.2. Other versions
may also be affected.

SOLUTION:
Disable the SSO functionality.

The vulnerability will reportedly be fixed in a patch soon.

PROVIDED AND/OR DISCOVERED BY:
karmaguedon

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