Transmission "comment" and "created by" Script Insertion Vulnerabilities

SA50027

CVE-2012-4037

27 Jul 2012

21 Aug 2012

Less Critical

Vendor Patch

Transmission 2.x

From remote

Cross-Site Scripting

Cross-Site Scripting vulnerabilities allow a third party to manipulate the content or behaviour of a web application in a user's browser, without compromising the underlying system.

Different Cross-Site Scripting related vulnerabilities are also classified under this category, including "script insertion" and "cross-site request forgery".

Cross-Site Scripting vulnerabilities are often used against specific users of a website to steal their credentials or to conduct spoofing attacks.

Justin C. Klein Keane has discovered two vulnerabilities in Transmission, which can be exploited by malicious people to conduct script insertion attacks.

Input passed via the "comment" and "created by" fields in an imported torrent file when viewing with the web client Inspector is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is being viewed.

Successful exploitation requires the web client to be enabled (disabled by default).

The vulnerabilities are reported in versions prior to 2.61 and confirmed in version 2.05.

Update to version 2.61.

Justin C. Klein Keane

Transmission:
https://trac.transmissionbt.com/wiki/Changes#version-2.61

Justin C. Klein Keane:
http://archives.neohapsis.com/archives/fulldisclosure/2012-07/0349.html