Citrix Access Gateway NESPA ActiveX Control

2011-09-1300:00:00

SAINT Corporation

my.saintcorporation.com

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

0.96 High

EPSS

Percentile

99.5%

JSON

Added: 09/13/2011
CVE: CVE-2011-2882
BID: 48676
OSVDB: 74191

Background

Citrix Access Gateway is an application remote-access solution.

Problem

The Citrix Access Gateway installs an ActiveX plug-in on the user’s browser. Plug-in versions 8.1-67.7, 9.0-70.5, and 9.1-96.4 are vulnerable to a stack overflow.

Resolution

Upgrade the plug-in to the latest version.

References

<http://support.citrix.com/article/CTX129902>

Limitations

This exploit has been tested against Citrix Systems Access Gateway Plug-in for Windows 8.0.59.1 on Windows XP SP3 English (DEP OptIn) and Windows Vista SP2 (DEP OptIn).