CVE-2018-17972
Published: 3 October 2018
An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through 4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents.
From the Ubuntu Security Team
Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux-gcp Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| bionic |
Released
(4.15.0-1027.28)
|
|
| cosmic |
Released
(4.18.0-1004.5)
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.15.0-1027.28~16.04.1)
|
|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-44.47)
|
| cosmic |
Released
(4.18.0-12.13)
|
|
| trusty |
Released
(3.13.0-165.215)
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.4.0-139.165)
|
|
|
Patches: Introduced by 2ec220e27f5040aec1e88901c1b6ea3d135787ad |
||
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| xenial |
Does not exist
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1032.34)
|
| cosmic |
Released
(4.18.0-1006.7)
|
|
| trusty |
Released
(4.4.0-1034.37)
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.4.0-1072.82)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1037.39)
|
| cosmic |
Released
(4.18.0-1006.6)
|
|
| trusty |
Released
(4.15.0-1037.39~14.04.2)
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.15.0-1037.39~16.04.1)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
upstream |
Released
(4.19~rc7)
|
| bionic |
Released
(4.15.0-1037.39)
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Released
(4.15.0-1037.39~16.04.1)
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.15.0-1032.34~16.04.1)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
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
(4.19~rc7)
|
|
| xenial |
Does not exist
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
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
(4.19~rc7)
|
|
| xenial |
Released
(4.15.0-45.48~16.04.1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.0.0-8.9~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.15.0-45.48~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1029.29)
|
| cosmic |
Released
(4.18.0-1005.5)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.4.0-1037.43)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Released
(4.4.0-139.165~14.04.1)
|
|
| upstream |
Released
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| 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
(4.19~rc7)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1033.38)
|
| cosmic |
Released
(4.15.0-1033.38)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1008.10)
|
| cosmic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.15.0-1008.10~16.04.1)
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1031.33)
|
| cosmic |
Released
(4.18.0-1007.9)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.4.0-1100.108)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc7)
|
|
| xenial |
Released
(4.4.0-1104.109)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17972
- https://marc.info/?l=linux-fsdevel&m=153806242024956&w=2
- https://lore.kernel.org/patchwork/patch/992734/
- https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=680d86b71ff9779f770758eaf9cadee98465223c
- https://ubuntu.com/security/notices/USN-3821-1
- https://ubuntu.com/security/notices/USN-3821-2
- https://ubuntu.com/security/notices/USN-3832-1
- https://ubuntu.com/security/notices/USN-3835-1
- https://ubuntu.com/security/notices/USN-3871-1
- https://ubuntu.com/security/notices/USN-3871-3
- https://ubuntu.com/security/notices/USN-3871-4
- https://ubuntu.com/security/notices/USN-3880-1
- https://ubuntu.com/security/notices/USN-3880-2
- https://ubuntu.com/security/notices/USN-3871-5
- NVD
- Launchpad
- Debian