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TITLE:
Microsoft .NET Framework Socket Restriction Bypass Vulnerability

SECUNIA ADVISORY ID:
SA45517

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45517/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45517

RELEASE DATE:
2011-08-10

DISCUSS ADVISORY:
http://secunia.com/advisories/45517/#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/45517/

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=45517

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 reported in Microsoft .NET Framework, which
can be exploited by malicious people to bypass certain security
restrictions or gain knowledge of sensitive information.

The vulnerability is caused due to an error when validating the trust
level within the System.Net.Sockets namespace and can be exploited to
bypass CAS (Code Access Security) restrictions or disclose
information via a specially crafted web page viewed using a browser
that supports XBAPs (XAML Browser Applications).

SOLUTION:
Apply patches.

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Michael J. Liu.

ORIGINAL ADVISORY:
MS11-069 (KB2567951, KB2539631, KB2539633, KB2539634, KB2539635,
KB2539636):
http://www.microsoft.com/technet/security/Bulletin/MS11-069.mspx

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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clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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