CVE-2019-6133
Published: 11 January 2019
In PolicyKit (aka polkit) 0.115, the "start time" protection mechanism can be bypassed because fork() is not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c.
From the Ubuntu Security Team
Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations.
Notes
Author | Note |
---|---|
mdeslaur |
This issue is better fixed in the kernel, adding kernel packages to this CVE. |
Priority
Status
Package | Release | Status |
---|---|---|
linux
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-46.49)
|
cosmic |
Released
(4.18.0-16.17)
|
|
disco |
Not vulnerable
(4.19.0-12.13)
|
|
trusty |
Released
(3.13.0-166.216)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.4.0-143.169)
|
|
Patches:
Introduced by
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
|
||
linux-aws
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1033.35)
|
cosmic |
Released
(4.18.0-1011.13)
|
|
disco |
Not vulnerable
(4.18.0-1011.13)
|
|
trusty |
Released
(4.4.0-1039.42)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.4.0-1077.87)
|
|
linux-aws-hwe
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-1033.35~16.04.1)
|
|
linux-azure
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1013.13~18.04.1)
|
cosmic |
Released
(4.18.0-1013.13)
|
|
disco |
Not vulnerable
(4.18.0-1013.13)
|
|
trusty |
Released
(4.15.0-1040.44~14.04.1)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-1040.44)
|
|
linux-azure-edge
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-1013.13~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-1040.44)
|
|
linux-euclid
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Ignored
(was needed ESM criteria)
|
|
linux-flo
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-gcp
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1028.29)
|
cosmic |
Released
(4.18.0-1007.8)
|
|
disco |
Not vulnerable
(4.18.0-1007.8)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-1028.29~16.04.1)
|
|
linux-gcp-edge
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1028.29)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-gke
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Ignored
(end of standard support)
|
|
linux-gke-4.15
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1030.32)
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-gke-5.0
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.0.0-1011.11~18.04.1)
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-goldfish
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Ignored
(end of life)
|
|
linux-grouper
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-hwe
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.18.0-16.17~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-46.49~16.04.1)
|
|
linux-hwe-edge
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(5.0.0-15.16~18.04.1)
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-46.49~16.04.1)
|
|
linux-kvm
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1030.30)
|
cosmic |
Released
(4.18.0-1008.8)
|
|
disco |
Not vulnerable
(4.18.0-1008.8)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.4.0-1041.47)
|
|
linux-lts-trusty
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-lts-utopic
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Ignored
(end of life, was ignored)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Ignored
(end of life, was ignored)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-lts-wily
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Ignored
(end of life, was ignored)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Released
(4.4.0-143.169~14.04.2)
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-maguro
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-mako
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-manta
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Does not exist
|
|
linux-oem
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1034.39)
|
cosmic |
Released
(4.15.0-1034.39)
|
|
disco |
Not vulnerable
(4.15.0-1034.39)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
linux-oracle
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1009.11)
|
cosmic |
Released
(4.15.0-1009.11)
|
|
disco |
Not vulnerable
(4.15.0-1009.11)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.15.0-1009.11~16.04.1)
|
|
linux-raspi2
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1032.34)
|
cosmic |
Released
(4.18.0-1010.12)
|
|
disco |
Not vulnerable
(4.18.0-1010.12)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.4.0-1104.112)
|
|
linux-snapdragon
Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1053.57)
|
cosmic |
Does not exist
|
|
disco |
Not vulnerable
(5.0.0-1010.10)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.0~rc2)
|
|
xenial |
Released
(4.4.0-1108.113)
|
|
policykit-1
Launchpad, Ubuntu, Debian |
bionic |
Released
(0.105-20ubuntu0.18.04.5)
|
cosmic |
Released
(0.105-21ubuntu0.4)
|
|
disco |
Released
(0.105-25)
|
|
trusty |
Released
(0.105-4ubuntu3.14.04.6)
|
|
upstream |
Needs triage
|
|
xenial |
Released
(0.105-14.1ubuntu0.5)
|
|
Patches:
upstream: https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76e2f81 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.7 |
Attack vector | Local |
Attack complexity | High |
Privileges required | Low |
User interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
References
- https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19
- https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf
- https://ubuntu.com/security/notices/USN-3901-1
- https://ubuntu.com/security/notices/USN-3901-2
- https://ubuntu.com/security/notices/USN-3903-1
- https://ubuntu.com/security/notices/USN-3903-2
- https://ubuntu.com/security/notices/USN-3908-1
- https://ubuntu.com/security/notices/USN-3908-2
- https://ubuntu.com/security/notices/USN-3910-1
- https://ubuntu.com/security/notices/USN-3910-2
- https://ubuntu.com/security/notices/USN-3934-1
- https://ubuntu.com/security/notices/USN-3934-2
- https://www.cve.org/CVERecord?id=CVE-2019-6133
- NVD
- Launchpad
- Debian