CVE-2019-6133
polkit: Temporary auth hijacking via PID reuse and non-atomic fork
Severity Score
6.7
*CVSS v3
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
En PolicyKit (también conocido como polkit) 0.115, el mecanismo de protección "start time" puede omitirse debido a que fork() no es atómico y, por lo tanto, las decisiones de autorización se cachean incorrectamente. Esto está relacionado con la falta de comprobación de uid en polkitbackend/polkitbackendinteractiveauthority.c.
A vulnerability was found in polkit. When authentication is performed by a non-root user to perform an administrative task, the authentication is temporarily cached in such a way that a local attacker could impersonate the authorized process, thus gaining access to elevated privileges.
USN-3903-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS. Jason Wang discovered that the vhost net driver in the Linux kernel contained an out of bounds write vulnerability. An attacker in a guest virtual machine could use this to cause a denial of service or possibly execute arbitrary code in the host kernel. Various other issues were also addressed.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2019-01-11 CVE Reserved
- 2019-01-11 CVE Published
- 2024-08-04 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-284: Improper Access Control
- CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
References (27)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/106537 | Third Party Advisory | |
| https://bugs.chromium.org/p/project-zero/issues/detail?id=1692 | Issue Tracking | |
| https://lists.debian.org/debian-lts-announce/2019/01/msg00021.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html | Mailing List |
|
| https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html | Mailing List |
|
| https://support.f5.com/csp/article/K22715344 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00049.html | 2020-08-24 | |
| https://access.redhat.com/errata/RHSA-2019:0230 | 2020-08-24 | |
| https://access.redhat.com/errata/RHSA-2019:0420 | 2020-08-24 | |
| https://access.redhat.com/errata/RHSA-2019:0832 | 2020-08-24 | |
| https://access.redhat.com/errata/RHSA-2019:2699 | 2020-08-24 | |
| https://access.redhat.com/errata/RHSA-2019:2978 | 2020-08-24 | |
| https://usn.ubuntu.com/3901-1 | 2020-08-24 | |
| https://usn.ubuntu.com/3901-2 | 2020-08-24 | |
| https://usn.ubuntu.com/3903-1 | 2020-08-24 | |
| https://usn.ubuntu.com/3903-2 | 2020-08-24 | |
| https://usn.ubuntu.com/3908-1 | 2020-08-24 | |
| https://usn.ubuntu.com/3908-2 | 2020-08-24 | |
| https://usn.ubuntu.com/3910-1 | 2020-08-24 | |
| https://usn.ubuntu.com/3910-2 | 2020-08-24 | |
| https://usn.ubuntu.com/3934-1 | 2020-08-24 | |
| https://usn.ubuntu.com/3934-2 | 2020-08-24 | |
| https://access.redhat.com/security/cve/CVE-2019-6133 | 2019-10-08 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1664212 | 2019-10-08 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Polkit Project Search vendor "Polkit Project" | Polkit Search vendor "Polkit Project" for product "Polkit" | 0.115 Search vendor "Polkit Project" for product "Polkit" and version "0.115" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 7.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "7.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Eus Search vendor "Redhat" for product "Enterprise Linux Server Eus" | 7.6 Search vendor "Redhat" for product "Enterprise Linux Server Eus" and version "7.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 7.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "7.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation" | 7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop" | 6.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "6.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server" | 6.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "6.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 6.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "6.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation" | 6.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "6.0" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04" | esm |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04" | lts |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 18.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.10" | - |
Affected
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