GLSA 200407-07: Shorewall : Insecure temp file handling

http://security.gentoo.org/

Severity:	normal
Title:	Shorewall : Insecure temp file handling
Date:	07/08/2004
Bugs:	#55675
ID:	200407-07

Synopsis

Shorewall contains a bug in the code handling the creation of temporary files and directories. This can allow a non-root user to overwrite arbitrary system files.

Background

Shorewall is a high level tool for configuring Netfilter, the firewall facility included in the Linux Kernel.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-firewall/shorewall	<= 1.4.10c	>= 1.4.10f	All supported architectures

Description

Shorewall uses temporary files and directories in an insecure manner. A local user could create symbolic links at specific locations, eventually overwriting other files on the filesystem with the rights of the shorewall process.

Impact

An attacker could exploit this vulnerability to overwrite arbitrary system files with root privileges, resulting in Denial of Service or further exploitation.

Workaround

There is no known workaround at this time. All users should upgrade to the latest available version of Shorewall.

Resolution

All users should upgrade to the latest available version of Shorewall, as follows:

    # emerge sync
    
    # emerge -pv ">=net-firewall/shorewall-1.4.10f"
    # emerge ">=net-firewall/shorewall-1.4.10f"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200407-07.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.