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Fencer Intel
medium 4.4

CVE-2013-1776 json

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 termi…

published 13y ago modified 4mo ago also EUVD-2013-1801

cvss
4.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

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.

Patch / fix

  • sudo Debian 14, Debian 13, Debian 12 1.8.5p2-1+nmu1

debian advisories DEBIAN-CVE-2013-1776

  • sudo RHEL 5 1.7.2p1-28.el5
  • sudo RHEL 6 1.8.6p3-7.el6

red hat advisories RHSA-2013:1353RHBA-2013:0363

  • sudo openSUSE Tumbleweed 1.8.18p1-1.1

opensuse advisories openSUSE-SU-2024:10551-1

Is CVE-2013-1776 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-1776 updated cvss 3.6

sudo: bypass of tty_tickets constraints

  • Red Hat Enterprise Linux (v. 5 server) sudo 1.7.2p1-28.el5 Red Hat Enterprise Linux Desktop (v. 5 client) sudo 1.7.2p1-28.el5
    fixed: vendor fix RHSA-2013:1353
  • Red Hat Enterprise Linux Desktop (v. 6) sudo 1.8.6p3-7.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) sudo 1.8.6p3-7.el6 Red Hat Enterprise Linux HPC Node (v. 6) sudo 1.8.6p3-7.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) sudo 1.8.6p3-7.el6 Red Hat Enterprise Linux Server (v. 6) sudo 1.8.6p3-7.el6 Red Hat Enterprise Linux Server Optional (v. 6) sudo 1.8.6p3-7.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) sudo 1.8.6p3-7.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) sudo 1.8.6p3-7.el6
    fixed: vendor fix RHBA-2013:0363

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.