CVE-2019-6133
UnknownEPSS 0.45%
Last modified
CVE-2019-6133 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Polkit Project | Polkit | 0.115 |
| Debian | Debian Linux | 8.0 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Server Aus | 7.6 |
| Redhat | Enterprise Linux Server Eus | 7.6 |
| Redhat | Enterprise Linux Server Tus | 7.6 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server Aus | 6.6 |
| Redhat | Enterprise Linux Workstation | 6.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 18.10 |
References
- http://www.securityfocus.com/bid/106537Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0230Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0420Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0832Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1692Issue Tracking, Mailing List, Third Party Advisory
- https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cfPatch, Third Party Advisory
- https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76e2f81Patch, Third Party Advisory
- https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00021.htmlMailing List, Third Party Advisory
- https://support.f5.com/csp/article/K22715344Third 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/Third Party Advisory
- https://usn.ubuntu.com/3908-2/Third Party Advisory
- https://usn.ubuntu.com/3910-1/Third Party Advisory
- https://usn.ubuntu.com/3910-2/Third Party Advisory
- https://usn.ubuntu.com/3934-1/Third Party Advisory
- http://www.securityfocus.com/bid/106537Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0230Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0420Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0832Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1692Issue Tracking, Mailing List, Third Party Advisory
- https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cfPatch, Third Party Advisory
- https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76e2f81Patch, Third Party Advisory
- https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/01/msg00021.htmlMailing List, Third Party Advisory
- https://support.f5.com/csp/article/K22715344Third 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/Third Party Advisory
- https://usn.ubuntu.com/3908-2/Third Party Advisory
- https://usn.ubuntu.com/3910-1/Third Party Advisory
- https://usn.ubuntu.com/3910-2/Third Party Advisory
- https://usn.ubuntu.com/3934-1/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2019-6133?
Severity scoring for CVE-2019-6133 is pending analysis. The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2019-6133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2019-6133?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST