GLSA 200511-16: GNUMP3d: Directory traversal and insecure temporary file creation

http://security.gentoo.org/

Severity:	normal
Title:	GNUMP3d: Directory traversal and insecure temporary file creation
Date:	11/21/2005
Bugs:	#111990
ID:	200511-16

Synopsis

Two vulnerabilities have been identified in GNUMP3d allowing for limited directory traversal and insecure temporary file creation.

Background

GNUMP3d is a streaming server for MP3s, OGG vorbis files, movies and other media formats.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-sound/gnump3d	< 2.9_pre7	>= 2.9_pre7	All supported architectures

Description

Ludwig Nussel from SUSE Linux has identified two vulnerabilities in GNUMP3d. GNUMP3d fails to properly check for the existence of /tmp/index.lok before writing to the file, allowing for local unauthorized access to files owned by the user running GNUMP3d. GNUMP3d also fails to properly validate the "theme" GET variable from CGI input, allowing for unauthorized file inclusion.

Impact

An attacker could overwrite files owned by the user running GNUMP3d by symlinking /tmp/index.lok to the file targeted for overwrite. An attacker could also include arbitrary files by traversing up the directory tree (at most two times, i.e. "../..") with the "theme" GET variable.

Workaround

There is no known workaround at this time.

Resolution

All GNUMP3d users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-sound/gnump3d-2.9_pre7"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200511-16.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.