OS Command Injection in Yaws - CVE-2020-24916
Published: September 9, 2020 / Updated: September 27, 2020
Vulnerability identifier: #VU47120
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-24916
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Yaws
Yaws
Software vendor:
yaws.hyber.org
yaws.hyber.org
Description
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation within CGI implementation in Yaws web server. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.
External links
- https://github.com/erlyaws/yaws/commits/master
- https://github.com/vulnbe/poc-yaws-cgi-shell-injection
- https://lists.debian.org/debian-lts-announce/2020/09/msg00022.html
- https://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html
- https://vuln.be/post/yaws-xxe-and-shell-injections/