CVE-2022-25217 Hardcoded credentials in Phicomm Routers
Attackers can obtain root shell access on Phicomm routers via telnet due to hardcoded cryptographic keys in the firmware.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-25217?
CVE-2022-25217 is a high-severity vulnerability in Phicomm Routers, published on 7 Mar 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Use of a hard-coded cryptographic key pair by the telnetd_startup service allows an attacker on the local area network to obtain a root shell on the device over telnet. The builds of telnetd_startup included in the version 22.5.9.163 of the K2 firmware, and version 32.1.15.93 of the K3C firmware (possibly amongst many other releases) included both the private and public RSA keys. The remaining versions cited here redacted the private key, but left the public key unchanged. An attacker in possession of the leaked private key may, through a scripted exchange of UDP packets, instruct telnetd_startup to spawn an unauthenticated telnet shell as root, by means of which they can then obtain complete control of the device. A consequence of the limited availablility of firmware images for testing is that models and versions not listed here may share this vulnerability.
Weakness: CWE-798
Which versions are affected by CVE-2022-25217?
It affects 2 products.
Products include Phicomm K2 Firmware, Phicomm K3c Firmware.
How do I fix CVE-2022-25217?
No fix has been published for CVE-2022-25217 yet. Limit exposure of the affected software until one is available.
Is CVE-2022-25217 being exploited?
There is no known exploitation of CVE-2022-25217 in the wild and no public exploit code.
Other vulnerabilities in Phicomm Routers
Sources
Also known as GHSA-vvvr-4847-2p4f.