OS Command Injection in DIR-859 - CVE-2019-17621
Published: January 29, 2020 / Updated: June 29, 2023
Vulnerability identifier: #VU24736
CSH Severity: High
CVSS v4.0: 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:A/U:Amber
CVE-ID: CVE-2019-17621
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: D-Link
Affected software:
DIR-859
DIR-859
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 in the UPnP endpoint URL in /gena.cgi. A remote unauthenticated attacker can send a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2019-17621
Install updates from vendor's website.
Sources
- http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html
- https://medium.com/@s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104
- https://medium.com/@s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147
- https://www.dlink.com/en/security-bulletin
- https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf