CVE-2021-20138 Command injection in Gryphon Tower router
Unauthenticated remote attackers can execute arbitrary commands as root on Gryphon Tower routers via the web interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20138?
CVE-2021-20138 is a high-severity command injection vulnerability in Gryphon Tower router, published on 9 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An unauthenticated command injection vulnerability exists in multiple parameters in the Gryphon Tower router’s web interface at /cgi-bin/luci/rc. An unauthenticated remote attacker on the same network can execute commands as root on the device by sending a specially crafted malicious packet to the web interface.
Weakness: CWE-78
Which versions are affected by CVE-2021-20138?
It affects 1 product.
Products include Gryphonconnect Gryphon Tower Firmware.
How do I fix CVE-2021-20138?
No fix has been published for CVE-2021-20138 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-20138 being exploited?
There is no known exploitation of CVE-2021-20138 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Gryphon Tower router
Sources
Also known as GHSA-82fw-x9gr-vc6q.