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Bug 238734 - (CVE-2007-2438) CVE-2007-2438 vim-7 modeline security issue
CVE-2007-2438 vim-7 modeline security issue
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Karsten Hopp
David Lawrence
: Security
Depends On:
  Show dependency treegraph
Reported: 2007-05-02 13:34 EDT by Josh Bressers
Modified: 2018-08-15 18:28 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-05-30 15:58:03 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Josh Bressers 2007-05-02 13:34:20 EDT
+++ This bug was initially created as a clone of Bug #238259 +++

Description of problem:
from the vim developer list:
> today somebody came to #vim, and pasted some modeline (containig joke or
> > such). He muttered something about not knowing what that means and left
> > before long. But (!) what I noticed is that feedkeys() was used as part of
> > foldexpression and it turned out that feedkeys() is allowed in sandbox,
> > which means malicious file can run arbitrary command via modeline like
> > this:
> > 
> > vim: fdm=expr fde=feedkeys("\\:!touch\ phantom_was_here\\<cr>")
> > 
> > I guess you can see the consequences. Is this known/intentional?

> That's pretty nasty.  I'll make a patch right away.
  This comment is from Bram Moolenaar, the upstream VIM maintainer

This issue is already public. Exploitable only if someone manages to get any
user to open a malicious file with vim. Even worse if that user is root ;-(
This should be fixed as fast as possible.

-- Additional comment from karsten@redhat.com on 2007-04-28 08:47 EST --
patch already available at 

-- Additional comment from karsten@redhat.com on 2007-04-30 05:13 EST --
More issues have been found:
Fix available at http://tech.groups.yahoo.com/group/vimdev/message/46667
Comment 1 Josh Bressers 2007-05-02 13:44:45 EDT
This flaw also affects FC7
Comment 2 Fedora Update System 2007-05-07 22:18:13 EDT
vim-7.0.235-1.fc6 has been pushed for fc6, which should resolve this issue.  If these problems are still present in this version, then please make note of it in this bug report.

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