Secunia Security Advisory - 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.
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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/
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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:
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http://secunia.com/advisories/45299/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=45299
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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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