Vulnerability in Polkit Project
CVE-2019-6133
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Polkit Project — versions 0.115
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0
- Red Hat Enterprise Linux Desktop — versions 7.0, 6.0
- Red Hat Enterprise Linux Server — versions 7.0, 6.0
- Red Hat Enterprise Linux Server Aus — versions 7.6, 6.6
- Red Hat Enterprise Linux Server Eus — versions 7.6
- Red Hat Enterprise Linux Server Tus — versions 7.6
- Red Hat Enterprise Linux Workstation — versions 7.0, 6.0
Weakness classification (CWE)
References
- gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76… (Patch, Third Party Advisory)
- usn.ubuntu.com/3903-2/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0230 (vendor-advisory, Third Party Advisory)
- git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/01/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3910-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3901-2/ (vendor-advisory, Third Party Advisory)
- gitlab.freedesktop.org/polkit/polkit/merge_requests/19 (Patch, Third Party Advisory)
- bugs.chromium.org/p/project-zero/issues/detail (Mailing List, Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/3910-2/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-6133?
- CVE-2019-6133 is a medium-severity vulnerability in Polkit Project, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.7/10. Published 2019-01-11.
- How severe is CVE-2019-6133?
- Medium severity. CVSS v3 base score is 6.7 out of 10.