CVE-2011-2883

2022-10-0316:15:17

CWE-20

[email protected]

web.nvd.nist.gov

citrix

access gateway

vulnerability

dll

validation

cve-2011-2883

nsepa

activex

security

man-in-the-middle

9.3 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

7.6 High

AI Score

Confidence

Low

0.001 Low

EPSS

Percentile

35.9%

JSON

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 configurations

NVD

Node

citrixaccess_gatewayMatch8.1enterprise

citrixaccess_gatewayMatch9.0enterprise

citrixaccess_gatewayMatch9.1enterprise

CPENameOperatorVersion
citrix:access_gatewaycitrix access gatewayeq8.1
citrix:access_gatewaycitrix access gatewayeq9.0
citrix:access_gatewaycitrix access gatewayeq9.1