CVE-2018-18397
Published: 12 December 2018
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
From the Ubuntu security team
Jann Horn discovered that the userfaultd implementation in the Linux kernel did not properly restrict access to certain ioctls. A local attacker could use this possibly to modify files.
Priority
Medium
CVSS 3 base score: 5.5
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-46.49)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Not vulnerable
(4.2.0-16.19)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
(3.11.0-12.19)
|
|
|
Patches: Introduced by 4c27fe4c4c84f3afd504ecff2420cc1ad420d38e Fixed by 9e368259ad988356c4c95150fafd1a06af095d98 Introduced by 4c27fe4c4c84f3afd504ecff2420cc1ad420d38e Fixed by 5b51072e97d587186c2f5390c8c9c1fb7e179505 Introduced by 4c27fe4c4c84f3afd504ecff2420cc1ad420d38e Fixed by 29ec90660d68bbdd69507c1c8b4e33aa299278b1 Introduced by 4c27fe4c4c84f3afd504ecff2420cc1ad420d38e Fixed by e2a50c1f64145a04959df2442305d57307e5395a Introduced by 4c27fe4c4c84f3afd504ecff2420cc1ad420d38e Fixed by dcf7fe9d89763a28e0f43975b422ff141fe79e43 |
||
|
linux-aws Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1033.35)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Not vulnerable
(4.4.0-1001.10)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
(4.4.0-1002.2)
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1033.35~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-1013.13~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1040.44)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(4.15.0-1040.44~14.04.1)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-1013.13~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1040.44)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(was needs-triage ESM criteria)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(abandoned)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1028.29)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1028.29~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-1007.8~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(end-of-life)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(end-of-life)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-16.17~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-46.49~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(5.0.0-8.9~18.04.1)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-46.49~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1030.30)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Not vulnerable
(4.4.0-1004.9)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [out of standard support])
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [out of standard support])
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [out of standard support])
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
(4.4.0-13.29~14.04.1)
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(abandoned)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
(trusty was ignored [abandoned])
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1034.39)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Ignored
(was needs-triage now end-of-life)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1009.11)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Released
(4.15.0-1009.11~16.04.1)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.15.0-1032.34)
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Not vulnerable
(4.2.0-1013.19)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.20~rc5)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
|
|
| Ubuntu 16.04 LTS (Xenial Xerus) |
Not vulnerable
(4.4.0-1012.12)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18397
- https://lore.kernel.org/lkml/20181126173452.26955-2-aarcange@redhat.com/
- https://usn.ubuntu.com/usn/usn-3901-1
- https://usn.ubuntu.com/usn/usn-3901-2
- https://usn.ubuntu.com/usn/usn-3903-1
- https://usn.ubuntu.com/usn/usn-3903-2
- NVD
- Launchpad
- Debian