Todd Miller sudo tty_tickets security bypass

sudo-ttytickets-sec-bypass (82453) The risk level is classified as MediumMedium Risk

Description:

Todd Miller sudo could allow a local attacker to bypass security restrictions, caused by an error related to the tty_tickets option and control of the terminal-specific time stamp file behavior. An attacker could exploit this vulnerability to run commands without having proper authentication.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 1.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Apply the appropriate update for your system. See References.

References:

  • Red Hat Bugzilla Bug 916365: CVE-2013-1776 sudo: bypass of tty_tickets constraints.
  • Sudo Web site: Sudo Main Page.
  • BID-58207: Todd Miller Sudo CVE-2013-1776 Local Security Bypass Vulnerability
  • BID-62741: Todd Miller Sudo CVE-2013-2776 Local Security Bypass Vulnerability
  • CVE-2013-1776: sudo 1.3.5 through 1.7.10 and 1.8.0 through 1.8.5, when the tty_tickets option is 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.
  • CVE-2013-2776: 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.
  • CVE-2013-2777: sudo before 1.7.10p5 and 1.8.x before 1.8.6p6, when the tty_tickets option is 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 a session without a controlling terminal device and 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.
  • DSA-2642: sudo -- several issues
  • RHSA-2013-1353: Low: sudo security and bug fix update
  • RHSA-2013-1701: Low: sudo security, bug fix and enhancement update

Platforms Affected:

  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux HPC Node 6
  • Todd Miller Sudo 1.6
  • Todd Miller Sudo 1.6.8
  • Todd Miller Sudo 1.7.0
  • Todd Miller Sudo 1.8
  • Todd Miller Sudo 1.8.1
  • Todd Miller Sudo 1.8.2
  • Todd Miller Sudo 1.8.3
  • Todd Miller Sudo 1.8.3p1

Reported:

Feb 27, 2013

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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