sudo: Privilege escalation

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200902-01 / sudo
Release Date	February 06, 2009
Latest Revision	February 06, 2009: 01
Impact	high
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-admin/sudo	< 1.7.0	>= 1.7.0	All supported architectures

Related bugreports: #256633

Synopsis

A vulnerability in sudo may allow for privilege escalation.

2. Impact Information

Background

sudo allows a system administrator to give users the ability to run commands as other users.

Description

Harald Koenig discovered that sudo incorrectly handles group specifications in Runas_Alias (and related) entries when a group is specified in the list (using %group syntax, to allow a user to run commands as any member of that group) and the user is already a member of that group.

Impact

A local attacker could possibly run commands as an arbitrary system user (including root).

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All sudo users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/sudo-1.7.0"

4. References

CVE-2009-0034

Page updated February 06, 2009

Summary: This is a Gentoo Linux Security Advisory

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