D-Link Multiple Routers Command Injection Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-25
• EPSS: 100% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The issue occurs when the attacker sends an arbitrary input to a "PingTest" device common gateway interface that could lead to common injection. An attacker who successfully triggers the command injection could achieve full system compromise. Later, it was independently found that these are also affected: DIR-855L, DAP-1533, DIR-862L, DIR-615, DIR-835, and DIR-825.

CISA: Multiple D-Link routers contain a command injection vulnerability which can allow attackers to achieve full system compromise.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 15 Apr 2022): The impacted product is end-of-life and should be disconnected if still in use.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• fortiguard.com/zeroday/FG-VD-19-117Broken LinkThird Party Advisory
• medium.com/%4080vul/determine-the-device-model-affected-by-cve-2019-16920-by-zoomeye-bf…ExploitThird Party Advisory
• www.kb.cert.org/vuls/id/766427Third Party AdvisoryUS Government Resource
• www.seebug.org/vuldb/ssvid-98079ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource