SB2011020801 - Cross-site scripting in Lussumo Vanilla

Description

This security bulletin contains information about 1 security vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2011-0526)

Vulnerability allows a remote attacker to perform Cross-site scripting attacks.

An input validation error exists in index.php in Vanilla Forums before 2.0.17 when processing Target parameter in a /entry/signin action. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security 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.

Remediation

Install update from vendor's website.

References

• http://openwall.com/lists/oss-security/2011/01/27/2
• http://openwall.com/lists/oss-security/2011/01/27/5
• http://secunia.com/advisories/43074
• http://www.osvdb.org/70677
• http://www.vanillaforums.org/discussion/14397/vanilla-2.0.17-released
• http://yehg.net/lab/pr0js/advisories/%5Bvanilla_forums-2.0.16%5D_cross_site_scripting