What is the severity of CVE-2011-2883?

CVE-2011-2883 is classified as a moderate severity vulnerability.

How do I fix CVE-2011-2883?

To fix CVE-2011-2883, you should upgrade to the appropriate version of Citrix Access Gateway that addresses the vulnerability.

What type of attack does CVE-2011-2883 allow?

CVE-2011-2883 allows man-in-the-middle attackers to execute arbitrary code due to improper validation of signed DLLs.

Which versions of Citrix Access Gateway are affected by CVE-2011-2883?

CVE-2011-2883 affects Citrix Access Gateway versions 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4.

What component is involved in CVE-2011-2883?

CVE-2011-2883 involves the NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx.

Vulnerability/
CVE-2011-2883

critical

9.3

CWE

21/7/2011

17/9/2024

CVE-2011-2883: Input Validation

First published: Thu Jul 21 2011(Updated: )

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.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Citrix Access Gateway	=8.1
Citrix Access Gateway	=9.0
Citrix Access Gateway	=9.1

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Reference Links

http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=928

Frequently Asked Questions

What is the severity of CVE-2011-2883?
CVE-2011-2883 is classified as a moderate severity vulnerability.
How do I fix CVE-2011-2883?
To fix CVE-2011-2883, you should upgrade to the appropriate version of Citrix Access Gateway that addresses the vulnerability.
What type of attack does CVE-2011-2883 allow?
CVE-2011-2883 allows man-in-the-middle attackers to execute arbitrary code due to improper validation of signed DLLs.
Which versions of Citrix Access Gateway are affected by CVE-2011-2883?
CVE-2011-2883 affects Citrix Access Gateway versions 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4.
What component is involved in CVE-2011-2883?
CVE-2011-2883 involves the NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx.

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agent/tags
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collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/first-publish-date
agent/event
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vendor/citrix
canonical/citrix access gateway
version/citrix access gateway/8.1
version/citrix access gateway/9.0
version/citrix access gateway/9.1

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