OpenLDAP: Insecure usage of /tmp during installation

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200701-19 / openldap
Release Date	January 23, 2007
Latest Revision	March 11, 2007: 02
Impact	low
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-nds/openldap	< 2.1.30-r10, < 2.2.28-r7, < 2.3.30-r2	>= 2.1.30-r10, >= 2.2.28-r7, >= 2.3.30-r2	All supported architectures

Related bugreports: #159508

Synopsis

A shell script commonly released with OpenLDAP makes insecure usage of files in /tmp during the emerge process.

2. Impact Information

Background

OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.

Description

Tavis Ormandy of the Gentoo Linux Security Team has discovered that the file gencert.sh distributed with the Gentoo ebuild for OpenLDAP does not exit upon the existence of a directory in /tmp during installation allowing for directory traversal.

Impact

A local attacker could create a symbolic link in /tmp and potentially overwrite arbitrary system files upon a privileged user emerging OpenLDAP.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All OpenLDAP users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose "net-nds/openldap"

4. References

CVE-2007-0476

Updated January 23, 2007

Summary: This is a Gentoo Linux Security Advisory

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