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Date: Fri, 15 Apr 2011 15:54:08 +0200
From: Yves-Alexis Perez <corsac@...ian.org>
To: oss-security@...ts.openwall.com
Subject: CVE request for Thunar (format string errors)

Two format string errors were recently fixed in Thunar (file manager for
Xfce).

The first one is
http://git.xfce.org/xfce/thunar/commit/?id=1d4dfafda30df071d7c1e0b370f0613cbc92ba74 (bug at https://bugzilla.xfce.org/show_bug.cgi?id=7128)  fixed in Thunar 1.2.1) and triggers when creating file from templates and calling it with a format string.

The second is
http://git.xfce.org/xfce/thunar/commit/?id=03dd312e157d4fa8a11d5fa402706ae5b05806fa and is triggered when copy/pasting a file named from a format string. There's no released version including the fix right now.

I've triggered the (second) bug using file named %s or %n but didn't
really manage to exploit it (it crashes just fine).

I'm not so sure it really needs a CVE so it's a request for discussion
as well :)

As a side note, I do use -Wformat -Wformat-security
-Werror=format-security (thanks to hardening-includes) for my Debian
builds, but as those function are wrappers of wrappers of wrappers to
printf() and stuff like that, -Wformat-security won't help. Is there a
way to work around that?

Regards,
-- 
Yves-Alexis

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