Website META Language: Insecure temporary file usage

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200803-23 / wml
Release Date	March 15, 2008
Latest Revision	March 15, 2008: 01
Impact	normal
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-lang/wml	< 2.0.11-r3	>= 2.0.11-r3	All supported architectures

Related bugreports: #209927

Synopsis

Multiple insecure temporary file vulnerabilities have been discovered in the Website META Language.

2. Impact Information

Background

Website META Language is a free and extensible Webdesigner's off-line HTML generation toolkit for Unix.

Description

Temporary files are handled insecurely in the files wml_backend/p1_ipp/ipp.src, wml_contrib/wmg.cgi, and wml_backend/p3_eperl/eperl_sys.c, allowing users to overwrite or delete arbitrary files with the privileges of the user running the program.

Impact

Local users can exploit the insecure temporary file vulnerabilities via symlink attacks to perform certain actions with escalated privileges.

3. Resolution Information

Workaround

Restrict access to the temporary directory to trusted users only.

Resolution

All Website META Language users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/wml-2.0.11-r3"

4. References

Updated March 15, 2008

Summary: This is a Gentoo Linux Security Advisory

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