CVE-2022-25217
First published: Mon Mar 07 2022(Updated: )
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.
Credit: vulnreport@tenable.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Phicomm K2 (psg1218) | <=22.5.9.163 | |
| Phicomm K2 (psg1218) | ||
| Phicomm K3c | <=32.1.15.93 | |
| Phicomm K3c Firmware |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-25217?
CVE-2022-25217 is considered a critical vulnerability due to its potential to allow unauthorized root access over telnet.
How do I fix CVE-2022-25217?
To fix CVE-2022-25217, you should update the affected Phicomm K2 firmware to a version newer than 22.5.9.163 and K3C firmware to a version newer than 32.1.15.93.
Which devices are affected by CVE-2022-25217?
CVE-2022-25217 affects Phicomm K2 firmware version 22.5.9.163 and K3C firmware version 32.1.15.93 and earlier.
What type of attack is possible due to CVE-2022-25217?
The vulnerability allows an attacker on the local area network to execute arbitrary commands with root privileges via telnet.
Is CVE-2022-25217 a remote or local vulnerability?
CVE-2022-25217 is a local vulnerability, as it requires access to the local area network for exploitation.
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- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/phicomm
- canonical/phicomm k2 (psg1218)
- version/phicomm k2 (psg1218)/22.5.9.163
- canonical/phicomm k3c
- version/phicomm k3c/32.1.15.93
- canonical/phicomm k3c firmware