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TITLE:
GNU Emacs Local Variable Processing Vulnerability

SECUNIA ADVISORY ID:
SA27508

VERIFY ADVISORY:
http://secunia.com/advisories/27508/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
GNU Emacs 22.x
http://secunia.com/product/16432/

DESCRIPTION:
Drake Wilson has reported a vulnerability in GNU Emacs, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error in the
"hack-local-variables" function where local variables within a file
are processed in an insecure manner. This can be exploited to e.g.
modify a user's user-init-file and execute arbitrary Emacs Lisp code
when a specially crafted file is opened.

Successful exploitation requires that "enable-local-variables" is set
to ":safe".

The vulnerability is reported in version 22.1. Other versions may
also be affected.

SOLUTION:
Fixed in the CVS repository.
http://cvs.savannah.gnu.org/viewvc/emacs/emacs/lisp/files.el?r1=1.896.2.28&r2=1.896.2.29

PROVIDED AND/OR DISCOVERED BY:
Drake Wilson

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=449008

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