CVE-2019-6133

moderate-risk
Published 2019-01-11

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.

Do I need to act?

-
0.03% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.7/10 Medium
LOCAL / HIGH complexity

Affected Products (17)

Affected Vendors

Debian Redhat Canonical Polkit Project

References (50)

http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00049.html
Third Party Advisory http://www.securityfocus.com/bid/106537
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0230
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0420
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0832
https://access.redhat.com/errata/RHSA-2019:2699
https://access.redhat.com/errata/RHSA-2019:2978
Issue Tracking https://bugs.chromium.org/p/project-zero/issues/detail?id=1692
Patch https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf
Patch https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d7...
Patch https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19
Mailing List https://lists.debian.org/debian-lts-announce/2019/01/msg00021.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
Third Party Advisory https://support.f5.com/csp/article/K22715344
Third Party Advisory https://usn.ubuntu.com/3901-1/
Third Party Advisory https://usn.ubuntu.com/3901-2/
Third Party Advisory https://usn.ubuntu.com/3903-1/
Third Party Advisory https://usn.ubuntu.com/3903-2/
Third Party Advisory https://usn.ubuntu.com/3908-1/
and 30 more references
36
/ 100
moderate-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 19/34 · Moderate