Unscored severity · published Jul 21, 2011
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…
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CVSS
1.5%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AG
Access Gateway · Citrix
8.1; 9.0; 9.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-2883
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-2883
labs.idefense.com
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=928
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