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TITLE:
Microsoft AntiXSS Library Escaped CSS Content Parsing Bypass Weakness

SECUNIA ADVISORY ID:
SA47483

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/47483/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47483

RELEASE DATE:
2012-01-10

DISCUSS ADVISORY:
https://secunia.com/advisories/47483/#comments

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

https://secunia.com/advisories/47483/

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=47483

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

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

DESCRIPTION:
A weakness has been reported in Microsoft AntiXSS Library, which can
be exploited by malicious people to bypass certain security
restrictions.

The weakness is caused due to an error within the sanitisation module
when parsing escaped CSS content and which can be exploited to conduct
cross-site scripting attacks.

The weakness is reported in version 4.0.

SOLUTION:
Update to version 4.2.

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

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Adi Cohen, IBM Rational Application Security.

ORIGINAL ADVISORY:
MS12-007 (KB2607664):
https://technet.microsoft.com/en-us/security/bulletin/ms12-007

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

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

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

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

EXPLOIT:
Further details available in Customer Area:
https://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.

Subscribe:
https://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
https://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
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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