CVE-2011-2883 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 che...
HighCVSS 9.3
EPSS 1.5%
- Published
- Updated
- Exploit status
- No public exploit known
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| citrix access gateway | = 8.1 | No fix listed |
| citrix access gateway | = 9.0 | No fix listed |
| citrix access gateway | = 9.1 | No fix listed |
References
- 20110714 Citrix Access Gateway ActiveX Arbitrary Libary Loading Vulnerability third-party-advisory