Horde Application Framework <=3.3.8 XSS Vulnerability

Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

Hi, Horde Application Framework v3.3.8 and lower are subject to a cross site scripting (XSS) vulnerability. The icon_browser.php script fails to properly sanitize user supplied input to the 'subdir' URL parameter before printing it out as part of a HTML formatted error message. The following URL can be used as a proof of concept: [path_to_horde]/util/icon_browser.php?subdir=<body onload="alert('XSS')">&app=horde Prior authentication is not required for exploitation. This vulnerability was reported to the Horde Project on 19.05.2010 and fixed by Michael M. Slusarz in the frameworks' GIT repository within a week: http://git.horde.org/diff.php/horde/util/icon_browser.php?rt=horde-git&r1=a978a35c3e95e784253508fd4333d2fbb64830b6&r2=9342addbd2b95f184f230773daa4faf5ef6d65e9 Hoping to see an upcoming fixed release (which did not take place) I have delayed publication - admittedly too much. Credits for this discovery: Moritz Naumann Naumann IT Security Consulting, Berlin, Germany http://moritz-naumann.com Moritz



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