An OS command injection vulnerability exists in various legacy D-Link routers—including DIR-300 rev B and DIR-600 (firmware ≤ 2.13 and ≤ 2.14b01, respectively)—due to improper input handling in the unauthenticated command.php endpoint. By sending specially crafted POST requests, a remote attacker can execute arbitrary shell commands with root privileges, allowing full takeover of the device. This includes launching services such as Telnet, exfiltrating credentials, modifying system configuration, and disrupting availability. The flaw stems from the lack of authentication and inadequate sanitation of the cmd parameter.
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
| Link | Tags |
|---|---|
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_command_php_exec_noauth.rb | exploit |
| https://www.exploit-db.com/exploits/24453 | exploit |
| https://www.exploit-db.com/exploits/27528 | exploit |
| https://web.archive.org/web/20131022221648/http://www.s3cur1ty.de/m1adv2013-003 | exploit technical description |
| https://www.vulncheck.com/advisories/d-link-legacy-unauth-rce | third party advisory |