Ubuntu: 1586-1: Emacs vulnerabilities
Posted by Benjamin D. Thomas   
Ubuntu Emacs could be made to run programs as your login if it opened a speciallycrafted file.
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Ubuntu Security Notice USN-1586-1
September 27, 2012

emacs23 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10

Summary:

Emacs could be made to run programs as your login if it opened a specially
crafted file.

Software Description:
- emacs23: The GNU Emacs editor (with GTK+ user interface)

Details:

Hiroshi Oota discovered that Emacs incorrectly handled search paths. If a
user were tricked into opening a file with Emacs, a local attacker could
execute arbitrary Lisp code with the privileges of the user invoking the
program. (CVE-2012-0035)

Paul Ling discovered that Emacs incorrectly handled certain eval forms in
local-variable sections. If a user were tricked into opening a specially
crafted file with Emacs, a remote attacker could execute arbitrary Lisp
code with the privileges of the user invoking the program. (CVE-2012-3479)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
  emacs23                         23.3+1-1ubuntu9.1
  emacs23-common                  23.3+1-1ubuntu9.1

Ubuntu 11.10:
  emacs23                         23.3+1-1ubuntu4.1
  emacs23-common                  23.3+1-1ubuntu4.1

After a standard system update you need to restart Emacs to make all the
necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1586-1
  CVE-2012-0035, CVE-2012-3479

Package Information:
  https://launchpad.net/ubuntu/+source/emacs23/23.3+1-1ubuntu9.1
  https://launchpad.net/ubuntu/+source/emacs23/23.3+1-1ubuntu4.1