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Fencer Intel
medium 4.4

CVE-2013-2777 json

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…

published 13y ago modified 4mo ago also EUVD-2013-2716

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 30%
public exploits
0
none known

Summary

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.

Patch / fix

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

debian advisories DEBIAN-CVE-2013-2777

  • sudo RHEL 6 1.8.6p3-12.el6

red hat advisories RHSA-2013:1701

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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-2013-2777 updated cvss 3.6

sudo: bypass of tty_tickets constraints

  • Red Hat Enterprise Linux Desktop (v. 6) sudo 1.8.6p3-12.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) sudo 1.8.6p3-12.el6 Red Hat Enterprise Linux HPC Node (v. 6) sudo 1.8.6p3-12.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) sudo 1.8.6p3-12.el6 Red Hat Enterprise Linux Server (v. 6) sudo 1.8.6p3-12.el6 Red Hat Enterprise Linux Server Optional (v. 6) sudo 1.8.6p3-12.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) sudo 1.8.6p3-12.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) sudo 1.8.6p3-12.el6
    fixed: vendor fix RHSA-2013:1701
  • Red Hat Enterprise Linux 5 sudo
    not affected: vulnerable code not present

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

0.36% chance of exploitation in the next 30 days, higher than 30% 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.