# CVE-2019-20044: zsh: The zsh shell is a command interpreter usable as an interactive login shell and as a shell script command processor

CVE-2019-20044 is fixed in 4 products on 1 platform, first by RHSA-2020:0903, released March 19, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2019-20044
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0050
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 24, 2020

## Description

The zsh shell is a command interpreter usable as an interactive login shell and as a shell script command processor. Zsh resembles the ksh shell (the Korn shell), but includes many enhancements. Zsh supports command-line editing, built-in spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and more.  Security Fix(es):  * zsh: insecure dropping of privileges when unsetting PRIVILEGED option (CVE-2019-20044)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | zsh RHEL 8 | 0:5.5.1-6.el8_1.2 | [RHSA-2020:0903](https://patchblox.com/security/data/fix/linux/rhsa-2020-0903.md) | Mar 19, 2020 |
| Linux | zsh Ubuntu 18.04.6 LTS (bionic) | 5.4.2-3ubuntu3.2 | [zsh 5.4.2-3ubuntu3.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-zsh-5.4.2-3ubuntu3.2.md) | Feb 14, 2022 |
| Linux | zsh ol 8 | 0:5.5.1-6.el8_1.2 | [ELSA-2020-0903](https://patchblox.com/security/data/fix/linux/elsa-2020-0903.md) | Mar 19, 2020 |
| Linux | zsh-common Ubuntu 18.04.6 LTS (bionic) | 5.4.2-3ubuntu3.2 | [zsh-common 5.4.2-3ubuntu3.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-zsh-common-5.4.2-3ubuntu3.2.md) | Feb 14, 2022 |
| Linux | zsh-html RHEL 8 | 0:5.5.1-6.el8_1.2 | [RHSA-2020:0903](https://patchblox.com/security/data/fix/linux/rhsa-2020-0903.md) | Mar 19, 2020 |
| Linux | zsh-html ol 8 | 0:5.5.1-6.el8_1.2 | [ELSA-2020-0903](https://patchblox.com/security/data/fix/linux/elsa-2020-0903.md) | Mar 19, 2020 |
| Linux | zsh-static Ubuntu 18.04.6 LTS (bionic) | 5.4.2-3ubuntu3.2 | [zsh-static 5.4.2-3ubuntu3.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-zsh-static-5.4.2-3ubuntu3.2.md) | Feb 14, 2022 |

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