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TITLE:
Citrix Access Gateway Plug-in for Windows nsepacom ActiveX Control
Vulnerabilities

SECUNIA ADVISORY ID:
SA45299

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45299/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45299

RELEASE DATE:
2012-08-01

DISCUSS ADVISORY:
http://secunia.com/advisories/45299/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/45299/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45299

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Secunia Research has discovered two vulnerabilities in Citrix Access
Gateway Plug-in for Windows, which can be exploited by malicious
people to compromise a user's system.

1) A boundary error in the nsepacom ActiveX control (nsepa.exe) when
processing HTTP responses based on the request via the "StartEpa()"
method can be exploited to cause a heap-based buffer overflow via an
overly long "CSEC" HTTP response header.

2) An integer overflow error in the nsepacom ActiveX control
(nsepa.exe) when processing HTTP responses based on the request via
the "StartEpa()" method can be exploited to cause a heap-based buffer
overflow via a specially crafted "Content-Length" HTTP response
header.

Successful exploitation of the vulnerabilities allows execution of
arbitrary code.

The vulnerabilities are confirmed in version 9.3.49.5. Other versions
may also be affected.

SOLUTION:
No official solution is currently available.

PROVIDED AND/OR DISCOVERED BY:
Dmitriy Pletnev, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2012-26/
http://secunia.com/secunia_research/2012-27/

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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