Webmin Command Injection Vulnerability
An issue was discovered in Webmin. The parameter old in password_change.cgi contains a command injection vulnerability.
A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-04-15 under CISA BOD 22-01.
This is a OS Command Injection (CWE-78) vulnerability in Webmin Webmin. An issue was discovered in Webmin <=1.920. The parameter old in password_change.cgi contains a command injection vulnerability. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.
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Phishing link
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Malicious file
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Server compromised
Probably yes if any of these apply:
Active exploitation documented in the wild. Threat-research write-up: http://packetstormsecurity.com/files/154141/Webmin-1.920-Remote-Command-Execution.html
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply updates per vendor instructions.
References
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References