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CVE-2019-20044

7.8 · HIGH

In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option.

Published Feb 24, 2020CWE-273EPSS 0.50%

Overview

CVE-2019-20044 is a high-severity vulnerability. It was published on February 24, 2020 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid().

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refseclists.org/fulldisclosure/2020/May/49Refseclists.org/fulldisclosure/2020/May/53Refseclists.org/fulldisclosure/2020/May/55Refseclists.org/fulldisclosure/2020/May/59Refzsh.sourceforge.net/releases.htmlGitHubgithub.com/XMB5/zsh-privileged-upgradeReflists.debian.org/debian-lts-announce/2020/03/msg00004.htmlReflists.debian.org/debian-lts-announce/2020/12/msg00000.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FP64FFIZI2CKQOEAOI5A72PVQULE7ZZC/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PN5V7MPHRRP7QNHOEK56S7QGRU53WUN6/

How CyberStrike helps

Frequently asked questions

What is CVE-2019-20044?

CVE-2019-20044 is a high-severity vulnerability. It was published on February 24, 2020 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2019-20044?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-20044?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-20044?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-20044 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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