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CVE-2016-2779

Published: 7 February 2017

runuser in util-linux allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.

Notes

AuthorNote
mdeslaur
2.31 introduced a --pty option that can be used
eslerm
upstream revereted their patch
backporting 2.31's optional --pty flag has high risk potential

Priority

Low

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
util-linux
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(2.31.1-0.4ubuntu3.3)
cosmic Not vulnerable
(2.32-0.1ubuntu2)
disco Not vulnerable
(2.33.1-0.1ubuntu2)
eoan Not vulnerable
(2.33.1-0.1ubuntu2)
focal Not vulnerable
(2.33.1-0.1ubuntu2)
precise Not vulnerable
(code not present)
trusty Not vulnerable
(code not present)
upstream
Released (2.31)
impish Not vulnerable
(2.33.1-0.1ubuntu2)
wily Ignored
(end of life)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
groovy Not vulnerable
(2.33.1-0.1ubuntu2)
jammy Not vulnerable
(2.33.1-0.1ubuntu2)
hirsute Not vulnerable
(2.33.1-0.1ubuntu2)
xenial Ignored
(no patch expected)
Patches:
upstream: https://github.com/karelzak/util-linux/commit/8e4925016875c6a4f2ab4f833ba66f0fc57396a2

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H