Description
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.
CVSS breakdown
CVSS 4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
High
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
Affected products
- D-Link / DIR-3000 – 2.13
- D-Link / DIR-6000 – 2.14b01
References
- EXPLOIThttps://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/http/dlink_command_php_exec_noauth.rb
- EXPLOIThttps://www.exploit-db.com/exploits/24453
- EXPLOIThttps://www.exploit-db.com/exploits/27528
- MISChttps://web.archive.org/web/20131022221648/http://www.s3cur1ty.de/m1adv2013-003
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/d-link-legacy-unauth-rce