Description
On D-Link DIR-620 devices with a certain customized (by ISP) variant of firmware 1.0.3, 1.0.37, 1.3.1, 1.3.3, 1.3.7, 1.4.0, and 2.0.22, OS command injection is possible as a result of incorrect processing of the res_buf parameter to index.cgi.
References
- https://securityaffairs.co/wordpress/72839/hacking/d-link-dir-620-flaws.html
- https://www.bleepingcomputer.com/news/security/backdoor-account-found-in-d-link-dir-620-routers/
- https://securelist.com/backdoors-in-d-links-backyard/85530/
- http://www.securitynewspaper.com/2018/05/25/d-link-dir-620-routers-critical-vulnerabilities/