GLSA 200703-20: LSAT: Insecure temporary file creation

http://security.gentoo.org/

Severity:	low
Title:	LSAT: Insecure temporary file creation
Date:	03/18/2007
Bugs:	#159542
ID:	200703-20

Synopsis

LSAT insecurely creates temporary files which can lead to symlink attacks allowing a local user to overwrite arbitrary files.

Background

The Linux Security Auditing Tool (LSAT) is a post install security auditor which checks many system configurations and local network settings on the system for common security or configuration errors and for packages that are not needed.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-admin/lsat	< 0.9.5	>= 0.9.5	All supported architectures

Description

LSAT insecurely writes in /tmp with a predictable filename.

Impact

A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When the LSAT script is executed, this would result in the file being overwritten with the rights of the user running the software, which could be the root user.

Workaround

There is no known workaround at this time.

Resolution

All lsat users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/lsat-0.9.5"

References

CVE-2007-1500

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200703-20.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.