CVE-2011-4508 Auth bypass in n/a

Critical 9.3 Published 3 Feb 2012 Updated 16 Sep 2024

Remote attackers can bypass authentication on Siemens HMI panels by exploiting predictable authentication tokens in cookies.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2011-4508?

CVE-2011-4508 is a critical authentication bypass vulnerability in n/a, published on 3 Feb 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.

Weakness: CWE-287

Which versions are affected by CVE-2011-4508?

It affects 5 products.

Products include Siemens Simatic Hmi Panels, Siemens Wincc, Siemens Wincc Flexible, Siemens Wincc Flexible Runtime, Siemens Wincc Runtime Advanced.

How do I fix CVE-2011-4508?

No fix has been published for CVE-2011-4508 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2011-4508 being exploited?

There is no known exploitation of CVE-2011-4508 in the wild and no public exploit code.

Sources

Also known as GHSA-fmw2-jxvh-9jcr.