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Gentoo: GLSA-201401-23 High: Sudo Privilege Escalation Risk Advisory

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Calendar Grey January 21, 2014
Scroller Gentoo
Several weaknesses in sudo facilitate privilege elevation. Update to enhance protection against this critical flaw.
Multiple vulnerabilities have been found in sudo which could result in privilege escalation.

Summary

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.

Topics%20covered

Topics Covered

security advisory high severity security issue gentoo privilege escalation sudo

Resolution

All sudo users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.8.6_p7"

References

[ 1 ] CVE-2013-1775 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-1775 [ 2 ] CVE-2013-1776 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-1776 [ 3 ] CVE-2013-2776 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2776 [ 4 ] CVE-2013-2777 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2777

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201401-23
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: High
Title: sudo: Privilege escalation
Date: January 21, 2014
Bugs: #459722
ID: 201401-23

Topics%20covered

Topics Covered

security advisory high severity security issue gentoo privilege escalation sudo

Synopsis

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

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-admin/sudo < 1.8.6_p7 >= 1.8.6_p7

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.