# CVE-2019-6133: pkexec: In PolicyKit (aka polkit) 0.115, the "start time" protection mechanism canbe bypassed because fork() is not atomic, a...

CVE-2019-6133 is fixed in 8 products on 1 platform, first by gir1.2-polkit-1.0 0.105-20ubuntu0.18.04.5, released January 10, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-6133
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 10, 2019

## Description

In PolicyKit (aka polkit) 0.115, the "start time" protection mechanism canbe bypassed because fork() is not atomic, and therefore authorizationdecisions are improperly cached. This is related to lack of uid checking inpolkitbackend/polkitbackendinteractiveauthority.c.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gir1.2-polkit-1.0 Ubuntu 18.04.6 LTS (bionic) | 0.105-20ubuntu0.18.04.5 | [gir1.2-polkit-1.0 0.105-20ubuntu0.18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gir1.2-polkit-1.0-0.105-20ubuntu0.18.04.5.md) | Jan 10, 2019 |
| Linux | gir1.2-polkit-1.0 Ubuntu 24.10 (oracular) | 0.105-25 | [gir1.2-polkit-1.0 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-gir1.2-polkit-1.0-0.105-25.md) | Jan 11, 2019 |
| Linux | gir1.2-polkit-1.0 Ubuntu 25.04 (plucky) | 0.105-25 | [gir1.2-polkit-1.0 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-gir1.2-polkit-1.0-0.105-25.md) | Jan 11, 2019 |
| Linux | libpolkit-agent-1-0 Ubuntu 18.04.6 LTS (bionic) | 0.105-20ubuntu0.18.04.5 | [libpolkit-agent-1-0 0.105-20ubuntu0.18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpolkit-agent-1-0-0.105-20ubuntu0.18.04.5.md) | Jan 10, 2019 |
| Linux | libpolkit-agent-1-0 Ubuntu 24.10 (oracular) | 0.105-25 | [libpolkit-agent-1-0 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libpolkit-agent-1-0-0.105-25.md) | Jan 11, 2019 |
| Linux | libpolkit-agent-1-0 Ubuntu 25.04 (plucky) | 0.105-25 | [libpolkit-agent-1-0 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libpolkit-agent-1-0-0.105-25.md) | Jan 11, 2019 |
| Linux | libpolkit-backend-1-0 Ubuntu 18.04.6 LTS (bionic) | 0.105-20ubuntu0.18.04.5 | [libpolkit-backend-1-0 0.105-20ubuntu0.18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpolkit-backend-1-0-0.105-20ubuntu0.18.04.5.md) | Jan 10, 2019 |
| Linux | libpolkit-gobject-1-0 Ubuntu 18.04.6 LTS (bionic) | 0.105-20ubuntu0.18.04.5 | [libpolkit-gobject-1-0 0.105-20ubuntu0.18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpolkit-gobject-1-0-0.105-20ubuntu0.18.04.5.md) | Jan 10, 2019 |
| Linux | libpolkit-gobject-1-0 Ubuntu 24.10 (oracular) | 0.105-25 | [libpolkit-gobject-1-0 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libpolkit-gobject-1-0-0.105-25.md) | Jan 11, 2019 |
| Linux | libpolkit-gobject-1-0 Ubuntu 25.04 (plucky) | 0.105-25 | [libpolkit-gobject-1-0 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libpolkit-gobject-1-0-0.105-25.md) | Jan 11, 2019 |
| Linux | pkexec Ubuntu 24.10 (oracular) | 0.105-25 | [pkexec 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-pkexec-0.105-25.md) | Jan 11, 2019 |
| Linux | pkexec Ubuntu 25.04 (plucky) | 0.105-25 | [pkexec 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-pkexec-0.105-25.md) | Jan 11, 2019 |
| Linux | policykit-1 Ubuntu 18.04.6 LTS (bionic) | 0.105-20ubuntu0.18.04.5 | [policykit-1 0.105-20ubuntu0.18.04.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-policykit-1-0.105-20ubuntu0.18.04.5.md) | Jan 10, 2019 |
| Linux | policykit-1 Ubuntu 24.10 (oracular) | 0.105-25 | [policykit-1 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-policykit-1-0.105-25.md) | Jan 11, 2019 |
| Linux | policykit-1 Ubuntu 25.04 (plucky) | 0.105-25 | [policykit-1 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-policykit-1-0.105-25.md) | Jan 11, 2019 |
| Linux | polkitd Ubuntu 24.10 (oracular) | 0.105-25 | [polkitd 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-polkitd-0.105-25.md) | Jan 11, 2019 |
| Linux | polkitd Ubuntu 25.04 (plucky) | 0.105-25 | [polkitd 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-polkitd-0.105-25.md) | Jan 11, 2019 |
| Linux | polkitd-pkla Ubuntu 24.10 (oracular) | 0.105-25 | [polkitd-pkla 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-polkitd-pkla-0.105-25.md) | Jan 11, 2019 |
| Linux | polkitd-pkla Ubuntu 25.04 (plucky) | 0.105-25 | [polkitd-pkla 0.105-25](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-polkitd-pkla-0.105-25.md) | Jan 11, 2019 |

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