Cross-site scripting in Microsoft products - CVE-2012-2520

Vulnerability identifier: #VU4236

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:A/U:Green

CVE-ID: CVE-2012-2520

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
Microsoft Communicator
Microsoft Lync
Microsoft Office InfoPath
Microsoft Office Web Apps
Microsoft Office
Microsoft SharePoint Server
Groove Server
Microsoft Windows SharePoint Services

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks and gain elevated privileges.

The vulnerability exists due to insufficient sanitization of user-input within HTML Sanitization Component. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user’s browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Note: the vulnerability was being actively exploited.

Install update from vendor's website.

• https://technet.microsoft.com/en-us/library/security/ms12-066