CVE-2022-25217

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Summary

CVECVE-2022-25217
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-03-10 17:47:00 UTC
Updated2022-03-17 19:21:00 UTC
DescriptionUse 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.

Risk And Classification

Problem Types: CWE-798

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Phicomm K2 - All All All
Operating System Phicomm K2 Firmware All All All All
Hardware Phicomm K3c - All All All
Operating System Phicomm K3c Firmware All All All All

References

ReferenceSourceLinkTags
Unpatchable Vulnerabilities in Phicomm Router Firmware - Research Advisory | Tenable® MISC www.tenable.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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