OS Command Injection in Emacs - CVE-2022-45939
Published: December 1, 2022 / Updated: February 26, 2023
Vulnerability identifier: #VU69808
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2022-45939
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Emacs
Emacs
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation when processing name of a source-code file in lib-src/etags.c. A remote attacker can trick the victim to use the "ctags *" command and execute arbitrary OS commands on the target system in a situation where the current working directory has contents that depend on untrusted input.
How to mitigate CVE-2022-45939
Install update from vendor's website.