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sudo: Privilege escalation

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201406-30 / sudo
Release Date June 27, 2014
Latest Revision June 27, 2014: 1
Impact high
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
app-admin/sudo < 1.8.5 >= 1.8.5, < 1.6.9 All supported architectures

Related bugreports: #503586

Synopsis

A vulnerability has been found in sudo allowing a local attacker to gain elevated privileges.

2.  Impact Information

Background

sudo allows a system administrator to give users the ability to run commands as other users. Access to commands may also be granted on a range to hosts.

Description

When the Sudo env_reset option is disabled (it is enabled by default), certain environment variables are not blacklisted as expected.

Impact

A local attacker, authorized to run commands using sudo, can use this flaw to execute arbitrary code or escalate his privileges.

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-1.8.5"

4.  References



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Page updated June 27, 2014

Summary: This is a Gentoo Linux Security Advisory

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