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TITLE:
Citrix Provisioning Services Stream Service Integer Underflow
Vulnerability

SECUNIA ADVISORY ID:
SA46162

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/46162/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=46162

RELEASE DATE:
2011-09-28

DISCUSS ADVISORY:
http://secunia.com/advisories/46162/#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/46162/

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=46162

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:
A vulnerability has been discovered in Citrix Provisioning Services,
which can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to an integer underflow error in
Ardence.CMessageUtils.fromMgrString() within Manager.dll when the
Stream Service component parses strings in incoming requests. This
can be exploited to cause a stack-based buffer overflow via a
specially crafted request containing an zero size value sent to UDP
port 6095.

This may be related to an incomplete fix for:
SA42954

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 5.6 SP1. Other versions may
also be affected.

SOLUTION:
Apply hotfix.

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits AbdulAziz Hariri, ThirdEye Testers via ZDI.

Additional details provided by Secunia Research.

ORIGINAL ADVISORY:
http://support.citrix.com/article/CTX130846

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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Please Note:
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Secunia NEVER sends attached files with advisories.
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use those supplied by the vendor.

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