sudo: Privilege escalation

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201006-09 / sudo
Release Date	June 01, 2010
Latest Revision	June 01, 2010: 01
Impact	high
Exploitable	local

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-admin/sudo	< 1.7.2_p6	>= 1.7.2_p6	All supported architectures

Related bugreports: #321697

Synopsis

A flaw in sudo's -e option may allow local attackers to execute arbitrary commands.

2. Impact Information

Background

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

Description

The command matching functionality does not properly handle when a file in the current working directory has the same name as a pseudo-command in the sudoers file and the PATH contains an entry for ".".

Impact

A local attacker with the permission to run sudoedit could, under certain circumstances, execute arbitrary commands as whichever user he has permission to run sudoedit as, typically 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-1.7.2_p6"

4. References

CVE-2010-1163

Page updated June 01, 2010

Summary: This is a Gentoo Linux Security Advisory

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