CVE-2013-2776

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CVE-2013-2776

Published: 8 Apr 2013Last Modified: 10 Apr 2026

Summary:

Details: sudo 1.3.5 through 1.7.10p5 and 1.8.0 through 1.8.6p6, when running on systems without /proc or the sysctl function with the tty_tickets option enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another terminal via vectors related to connecting to the standard input, output, and error file descriptors of another terminal. NOTE: this is one of three closely-related vulnerabilities that were originally assigned CVE-2013-1776, but they have been SPLIT because of different affected versions.

References: http://rhn.redhat.com/errata/RHSA-2013-1353.html, http://rhn.redhat.com/errata/RHSA-2013-1701.html, http://www.debian.org/security/2013/dsa-2642, http://www.sudo.ws/repos/sudo/rev/049a12a5cc14, http://www.sudo.ws/repos/sudo/rev/0c0283d1fafa, https://support.apple.com/kb/HT205031, https://bugzilla.redhat.com/show_bug.cgi?id=916365, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701839, http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html, http://www.openwall.com/lists/oss-security/2013/02/27/31, http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html, http://www.securityfocus.com/bid/58207, http://www.securityfocus.com/bid/62741, http://www.slackware.com/security/viewer.php?l=slackware-security&y=2013&m=slackware-security.517440, http://www.sudo.ws/sudo/alerts/tty_tickets.html, https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/87023, https://exchange.xforce.ibmcloud.com/vulnerabilities/82453

Affected packages

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High