sudo: Privilege escalation — GLSA 201401-23

Multiple vulnerabilities have been found in sudo which could result in privilege escalation.

Affected Packages

app-admin/sudo on all architectures
Affected versions < 1.8.6_p7
Unaffected versions >= 1.8.6_p7

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

Multiple vulnerabilities have been found in sudo:

  • sudo does not correctly validate the controlling terminal on a system without /proc or when the tty_tickets option is enabled.
  • sudo does not properly handle the clock when it is set to the epoch.

Impact

A local attacker with sudo privileges could connect to the stdin, stdout, and stderr of the terminal of a user who has authenticated with sudo, allowing the attacker to hijack the authorization of the other user. Additionally, a local or physically proximate attacker could set the system clock to the epoch, bypassing time restrictions on sudo authentication.

Workaround

There is no known workaround at this time.

Resolution

All sudo users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.8.6_p7"
 

References

Release Date
January 21, 2014

Latest Revision
January 21, 2014: 1

Severity
high

Exploitable
local

Bugzilla entries