CVE-2022-25219

2022-03-0721:56:51

tenable

www.cve.org

8.1 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

61.4%

JSON

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).

CNA Affected

[
  {
    "product": "Phicomm Routers",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "K3 >= 21.5.37.246, K3C >= 32.1.22.113, K2P >= 20.4.1.7, K2 A7 >= 22.6.506.28, K2G A1 >= 22.6.3.20"
      }
    ]
  }
]

References

www.tenable.com/security/research/tra-2022-01