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
Author | Note |
---|---|
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
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2779
- http://www.openwall.com/lists/oss-security/2016/02/27/1
- http://marc.info/?l=util-linux-ng&m=145694736107128&w=2
- https://github.com/util-linux/util-linux/commit/a0a8e9884443601abf9f06b715f2f6bb0820cbad
- https://github.com/util-linux/util-linux/commit/23f75093264aae5d58d61016cb1a29d8ebdfa157
- NVD
- Launchpad
- Debian