SecurityReason - Cross site scripting (XSS) in rss feed plugin of Serendipity 1.2

Advisory Text :

Source: http://www.int21.de/cve/CVE-2007-6205-s9y.html

Cross site scripting (XSS) in rss feed plugin of Serendipity 1.2

References
http://www.s9y.org/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6205

Description
The Serendipity blog system contains a plugin to display the content of
feeds
in the sidebar (serendipity_plugin_remoterss). If an attacker can modify
the
RSS feed, it's possible to inject javascript code in the link part, because

it's not correctly escaped.

Sample code
Sample feed injecting code:
<rss version="2.0">
<channel><item><title>foo</title>
<link>" onMouseOver="alert(1)</link></item></channel>
</rss>

Workaround/Fix
Serendipity developers have fixed this in svn and all further version,
please
update to 1.2.1 or above.

CVE Information
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name
CVE-2007-6205 to this issue. This is a candidate for inclusion in the CVE
list (http://cve.mitre.org/), which standardizes names for security
problems.

Credits and copyright
This vulnerability was discovered by Hanno Boeck of schokokeks.org
webhosting.
It's licensed under the creative commons attribution license.

Hanno Boeck, 2007-12-05, http://www.hboeck.de

--
Hanno BÃ¶ck Blog: http://www.hboeck.de/
GPG: 3DBD3B20 Jabber/Mail: hanno (at) hboeck (dot) de [email concealed]
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