CVE-2011-2883
9.3 · HIGHOverview
CVE-2011-2883 is a high-severity vulnerability affecting citrix access_gateway. It was published on July 21, 2011 and has a CVSS 2.0 base score of 9.3 (HIGH).
This vulnerability has a CVSS 2.0 base score of 9.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from citrix. Update access_gateway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
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Frequently Asked Questions
What is CVE-2011-2883?
CVE-2011-2883 is a high-severity vulnerability affecting citrix access_gateway. It was published on July 21, 2011 and has a CVSS 2.0 base score of 9.3 (HIGH).
How severe is CVE-2011-2883?
This vulnerability has a CVSS 2.0 base score of 9.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2011-2883?
Check the references section for vendor advisories and patches from citrix. Update access_gateway to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2011-2883?
CyberStrike's AI-powered security agents can automatically detect CVE-2011-2883 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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