GLSA 200712-03: GNU Emacs: Multiple vulnerabilities

Severity:normal
Title:GNU Emacs: Multiple vulnerabilities
Date:12/09/2007
Bugs: #197958, #200297
ID:200712-03

Synopsis

Two vulnerabilities were found in GNU Emacs possibly leading to the execution of arbitrary code.

Background

GNU Emacs is a highly extensible and customizable text editor.

Affected packages

Package Vulnerable Unaffected Architecture(s)
app-editors/emacs < 22.1-r3 >= 22.1-r3 All supported architectures

Description

Drake Wilson reported that the hack-local-variables() function in GNU Emacs 22 does not properly match assignments of local variables in a file against a list of unsafe or risky variables, allowing to override them (CVE-2007-5795). Andreas Schwab (SUSE) discovered a stack-based buffer overflow in the format function when handling values with high precision (CVE-2007-6109).

Impact

Remote attackers could entice a user to open a specially crafted file in GNU Emacs, possibly leading to the execution of arbitrary Emacs Lisp code (via CVE-2007-5795) or arbitrary code (via CVE-2007-6109) with the privileges of the user running GNU Emacs.

Workaround

The first vulnerability can be worked around by setting the "enable-local-variables" option to "nil", disabling the processing of local variable lists. GNU Emacs prior to version 22 is not affected by this vulnerability. There is no known workaround for the second vulnerability at this time.

Resolution

All GNU Emacs users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-editors/emacs-22.1-r3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200712-03.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

License

Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

Thank you!