Red Hat Bugzilla – Bug 461887
CVE-2008-3824 horde: XSS via unescaped '/' characters (oCERT-2008-012)
Last modified: 2010-04-02 06:37:23 EDT
oCERT reported an XSS vulnerability discovered by Alexios Fakos affecting horde:
Horde relies on code similar to Popoon's externalinput.php to filter out
potential XSS attacks on user-supplied input. This filter, and the original,
fail to fully sanitize user data. In particular, this filter fails to protect
against '/'s acting as spaces in both Microsoft Internet Explorer and Mozilla
For example, the following snippet, supplied by the reporter, is treated as
valid by the browsers but safe by the filter: <body/onload=alert(/w00w00/)>
According to oCERT, this affects 3.1.x and 3.2.x versions of Horde, possibly others.
http://ocert.org/patches/2008-012/Text_Filter.patch (for 3.2.x)
Advisory from the reporter:
Horde Application Framework version 3.2.2 announced on September 10th 2008
The Horde Team is pleased to announce the final release of the Horde
Application Framework version 3.2.2.
This is a security release that fixes unescaped output in the MIME library
(CVE-2008-3823), and further improves the XSS filter for HTML messages
(CVE-2008-3824). The unescaped output vulnerability can be triggered by sending
specially crafted e-mail messages to Horde users, if they use a Horde mail
client. All users are encouraged to upgrade to this version.
The major changes compared to the Horde version H3 (3.2.1) are:
* Fixed unescaped output in the MIME library.
* Further improved the XSS filter for HTML.
In addition on December 10th 2008 version 3.2.3 was released:
This is a minor security release that adds another check to the XSS filter for
an Internet Explorer exploit. All users are encouraged to upgrade to this
The major changes compared to the Horde version H3 (3.2.2) are:
* Added another check to the XSS filter (only IE is vulnerable).
There is also a 3.3.2 version but I guess that this would be a more complicated
I haven't tested for this XSS exploit -- my interest in a 3.2.2 version of
Horde is so that I can install Ansel:
Ansel 1.0 requires version 3.2.2 or greater of the Horde Framework - earlier
versions of Horde will not work.
I'm using the epel-5 package.
horde-3.3.6-1.fc11 has been submitted as an update for Fedora 11.
horde-3.3.6-1.fc12 has been submitted as an update for Fedora 12.
horde-3.3.6-1.fc13 has been submitted as an update for Fedora 13.
horde-3.3.6-1.el5 has been submitted as an update for Fedora EPEL 5.
horde-3.3.6-1.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.
horde-3.3.6-1.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.
horde-3.3.6-1.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.
horde-3.3.6-1.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.