CVE-2019-20044 Detail

Current 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().


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/fulldisclosure/2020/May/49 Mailing List  Third Party Advisory 
http://seclists.org/fulldisclosure/2020/May/53 Mailing List  Third Party Advisory 
http://seclists.org/fulldisclosure/2020/May/55 Mailing List  Third Party Advisory 
http://seclists.org/fulldisclosure/2020/May/59 Mailing List  Third Party Advisory 
http://zsh.sourceforge.net/releases.html Release Notes  Third Party Advisory 
https://github.com/XMB5/zsh-privileged-upgrade Broken Link 
https://lists.debian.org/debian-lts-announce/2020/03/msg00004.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FP64FFIZI2CKQOEAOI5A72PVQULE7ZZC/ Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PN5V7MPHRRP7QNHOEK56S7QGRU53WUN6/ Mailing List  Third Party Advisory 
https://security.gentoo.org/glsa/202003-55 Third Party Advisory 
https://support.apple.com/HT211168 Third Party Advisory 
https://support.apple.com/HT211170 Third Party Advisory 
https://support.apple.com/HT211171 Third Party Advisory 
https://support.apple.com/HT211175 Third Party Advisory 
https://support.apple.com/kb/HT211168 Third Party Advisory 
https://support.apple.com/kb/HT211170 Third Party Advisory 
https://support.apple.com/kb/HT211171 Third Party Advisory 
https://support.apple.com/kb/HT211175 Third Party Advisory 
https://www.zsh.org/mla/zsh-announce/141 Release Notes  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-273 Improper Check for Dropped Privileges cwe source acceptance level NIST  

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Change History

13 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-20044
NVD Published Date:
02/24/2020
NVD Last Modified:
09/16/2021
Source:
MITRE