CVE-2011-2883 Code injection in n/a
Man-in-the-middle attackers can execute arbitrary code by exploiting flawed DLL signature validation in the Citrix Access Gateway ActiveX control.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2011-2883?
CVE-2011-2883 is a critical code injection vulnerability in n/a, published on 21 Jul 2011. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx in Citrix Access Gateway Enterprise Edition 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4 attempts to validate signed DLLs by checking the certificate subject, not the signature, which allows man-in-the-middle attackers to execute arbitrary code via HTTP header data referencing a DLL that was signed with a crafted certificate.
Weakness: CWE-20
Which versions are affected by CVE-2011-2883?
It affects 1 product.
Products include Citrix Access Gateway.
How do I fix CVE-2011-2883?
No fix has been published for CVE-2011-2883 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2011-2883 being exploited?
There is no known exploitation of CVE-2011-2883 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-h237-vcw4-4cvv.