CVE-2022-25219 : faille élevée phicomm k2 firmware (CVSS 8.4)

A null byte interaction error has been discovered in the code that the telnetd_startup daemon uses to construct a pair of ephemeral passwords that allow a user to spawn a telnet service on the router, and to ensure that the telnet service persists upon reboot. By means of a crafted exchange of UDP packets, an unauthenticated attacker on the local network can leverage this null byte interaction error in such a way as to make those ephemeral passwords predictable (with 1-in-94 odds). Since the attacker must manipulate data processed by the OpenSSL function RSA_public_decrypt(), successful exploitation of this vulnerability depends on the use of an unpadded RSA cipher (CVE-2022-25218).

Sévérité

Élevée (CVSS 8.4)

Vecteur CVSS

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

10 mars 2022

Dernière mise à jour

17 juin 2026

• phicomm k2 firmware
• phicomm k3 firmware
• phicomm k3c firmware
• phicomm k2g firmware
• phicomm k2p firmware

• Fiche CVE-2022-25219 sur le NVD (NIST)
• tenable.com/security/research/tra-2022-01