Vendor: The Horde Project, http://www.horde.org/
Affected Products: Horde >= 3.2, Horde <= 3.2.1
Vulnerability: Cross-Site Scripting in filename MIME attachments
2008/07/25 Bug found and PoC preparation
2008/07/26 Vulnerability report submitted via oCert online-form
2008/08/05 oCert confirmed the submission. oCert starts the
coordination of affected authors/vendors
2008/09/06 oCert informs all parties about the advisory release
2008/09/11 n.runs AG releases this advisory in coordination with
The Horde project is about creating high quality Open Source
applications, based on PHP and the Horde Framework.
The guiding principles of the Horde Project are to create solid
standards-based applications using intelligent object-oriented design
that, wherever possible, are designed to run on a wide range of
platforms and backends. There is great emphasis on making Horde as
friendly to non-English speakers as possible. The Horde Framework
currently supports many localization features such as unicode and
right-to-left text and generous users have contributed many translations
for the framework and applications.
Currently Horde Project boasts many applications, some already
enterprise-ready and deployed in demanding environments, and some
exciting new ones still in development.
The Horde Framework fails to properly sanitize the filename of MIME
attachments on received emails.
While a webmail user is viewing an email with a malicously prepared
filename attachment, the attacker can highjack victim's account.
This allows him to send emails on behalf of the victim or to do other
For detailed information about the fixes, follow the link in the
references section  of this document.
Bug found by Alexios Fakos of n.runs AG.
Many thanks to Will Drewry of oCert team for the coordination and
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