GLSA 200710-22: TRAMP: Insecure temporary file creation

http://security.gentoo.org/

Severity:	normal
Title:	TRAMP: Insecure temporary file creation
Date:	10/20/2007
Bugs:	#194713
ID:	200710-22

Synopsis

The TRAMP package for GNU Emacs insecurely creates temporary files.

Background

TRAMP is a remote file editing package for GNU Emacs, a highly extensible and customizable text editor.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-emacs/tramp	< 2.1.10-r2	>= 2.1.10-r2	All supported architectures

Description

Stefan Monnier discovered that the tramp-make-tramp-temp-file() function creates temporary files in an insecure manner.

Impact

A local attacker could create symbolic links in the directory where the temporary files are written, pointing to a valid file somewhere on the filesystem that is writable by the user running TRAMP. When TRAMP writes the temporary file, the target valid file would then be overwritten with the contents of the TRAMP temporary file.

Workaround

There is no known workaround at this time.

Resolution

All TRAMP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-emacs/tramp-2.1.10-r2"

References

CVE-2007-5377

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200710-22.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.