CVE-2022-25218 : faille élevée phicomm k2 firmware (CVSS 8.1)

The use of the RSA algorithm without OAEP, or any other padding scheme, in telnetd_startup, allows an unauthenticated attacker on the local area network to achieve a significant degree of control over the "plaintext" to which an arbitrary blob of ciphertext will be decrypted by OpenSSL's RSA_public_decrypt() function. This weakness allows the attacker to manipulate the various iterations of the telnetd startup state machine and eventually obtain a root shell on the device, by means of an exchange of crafted UDP packets. In all versions but K2 22.5.9.163 and K3C 32.1.15.93 a successful attack also requires the exploitation of a null-byte interaction error (CVE-2022-25219).

Sévérité

Élevée (CVSS 8.1)

Vecteur CVSS

CVSS:3.1/AV:N/AC:H/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-2022-25218 sur le NVD (NIST)
• tenable.com/security/research/tra-2022-01