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Exploits
ID:2224 - Exploit for Improper Check for Dropped Privileges in zsh - CVE-2019-20044
ID:2224 - Exploit for Improper Check for Dropped Privileges in zsh - CVE-2019-20044
Published: March 19, 2020
Vulnerability identifier: #VU26210
Vulnerability risk: Low
CVE-ID: CVE-2019-20044
CWE-ID: CWE-273
Exploitation vector: Local access
Vulnerable software:
zsh
zsh
Link to public exploit:
Vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to Zsh fails to overwrite the saved uid, so the original privileges, dropped by the --no-PRIVILEGED option, can be restored by
executing MODULE_PATH=/dir/with/module zmodload with a module that calls
setuid(). A local user can execute arbitrary commands on the system with elevated privileges.
Remediation
Install updates from vendor's website.