CVE-2018-18386
Published: 17 October 2018
drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.
From the Ubuntu Security Team
Tetsuo Handa discovered a logic error in the TTY subsystem of the Linux kernel. A local attacker with access to pseudo terminal devices could use this to cause a denial of service.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
xenial |
Released
(4.4.0-1088.93)
|
| bionic |
Not vulnerable
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
|
linux Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc6)
|
| trusty |
Released
(3.13.0-164.214)
|
|
| xenial |
Released
(4.4.0-119.143)
|
|
| bionic |
Not vulnerable
(4.15.0-10.11)
|
|
| cosmic |
Not vulnerable
(4.15.0-20.21)
|
|
|
Patches: Introduced by 26df6d13406d1a53b0bda08bd712f1924affd7cd |
||
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc6)
|
| trusty |
Released
(4.4.0-1016.16)
|
|
| xenial |
Released
(4.4.0-1054.63)
|
|
| bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
| cosmic |
Not vulnerable
(4.15.0-1007.7)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
| cosmic |
Not vulnerable
(4.15.0-1009.9)
|
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.15.0-1013.13~16.04.2)
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
upstream |
Released
(4.15~rc6)
|
| trusty |
Does not exist
|
|
| xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.15.0-1013.13~16.04.2)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1001.1)
|
| cosmic |
Not vulnerable
(4.15.0-1006.6)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.15.0-1014.14~16.04.1)
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1004.5~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Ignored
(end of life)
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-13.14~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.15.0-24.26~16.04.1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-12.13~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.15.0-24.26~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.2)
|
| cosmic |
Not vulnerable
(4.15.0-1008.8)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.4.0-1020.25)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Released
(4.4.0-119.143~14.04.1)
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1002.3)
|
| cosmic |
Not vulnerable
(4.15.0-1004.5)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
| cosmic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1006.7)
|
| cosmic |
Not vulnerable
(4.15.0-1010.11)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.15~rc6)
|
|
| xenial |
Released
(4.4.0-1086.94)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.3 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18386
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348
- https://bugzilla.suse.com/show_bug.cgi?id=1094825
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
- https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f056348
- https://ubuntu.com/security/notices/USN-3849-1
- https://ubuntu.com/security/notices/USN-3849-2
- NVD
- Launchpad
- Debian