From: Eli Zaretskii <eliz@gnu.org>
To: emacs-devel@gnu.org
Subject: [mwelinder@gmail.com: Emacs security bug]
Date: Sat, 10 May 2008 00:44:44 +0300 [thread overview]
Message-ID: <u3aorm9tf.fsf@gnu.org> (raw)
------- Start of forwarded message -------
X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00 autolearn=ham
version=3.1.0
Date: Fri, 9 May 2008 12:45:25 -0400
From: "Morten Welinder" <mwelinder@gmail.com>
To: eliz@gnu.org
Subject: Emacs security bug
Hi there,
it's been a while or two -- DJGPP was hot, new technology when we last
spoke, :-)
It's unclear to me where to send Emacs security concerns, so I am sending
this one to you. Please forward appropriately.
1. Create .emacs with contents
(global-font-lock-mode t)
(seq font-lock-support-mode 'fast-lock-mode)
2. Create foo.c with contents /* Nothing to see here */
3. Create foo.c.flc with contents (message "Something to see here!")
4. Start Emacs and load foo.c
- --> Observe that code from foo.c.flc is run. Not good.
(This is with Emacs 21.3.1; XEmacs is also affected, although step 1 needs to
be adjusted.)
Suggestions:
a. Remove "." from fast-lock-cache-directories. Littering little
files everywhere
is not a good idea anyway.
b. Don't use load to handle the .flc file. Instead read it into a
buffer and read
one s-expression at a time and verify that it is sane before evaluating it.
c. Don't use files owned by anyone else. This cannot stand alone, though, as
it has a race condition.
Morten Welinder
------- End of forwarded message -------
next reply other threads:[~2008-05-09 21:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-09 21:44 Eli Zaretskii [this message]
2008-05-09 23:19 ` [mwelinder@gmail.com: Emacs security bug] Chong Yidong
2008-05-10 7:40 ` Eli Zaretskii
2008-05-10 8:28 ` Christian Faulhammer
2008-05-10 14:50 ` Chong Yidong
2008-05-10 15:16 ` Eli Zaretskii
2008-05-12 10:10 ` Marshall, Simon
2008-05-12 14:31 ` Stefan Monnier
2008-05-12 16:37 ` Marshall, Simon
2008-05-12 17:30 ` Stefan Monnier
2008-05-12 20:14 ` Ulrich Mueller
2008-05-12 20:37 ` Ulrich Mueller
2008-05-13 9:00 ` Marshall, Simon
2008-05-14 14:41 ` Ulrich Mueller
2008-05-14 14:52 ` Marshall, Simon
2008-05-12 20:45 ` Stefan Monnier
2008-05-12 14:36 ` Florian Weimer
2008-05-12 16:21 ` Marshall, Simon
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