Vulnerability Details CVE-2022-25219
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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 30.7%
CVSS Severity
CVSS v3 Score 8.4
CVSS v2 Score 6.9
References
Products affected by CVE-2022-25219
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cpe:2.3:h:phicomm:k2:-
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cpe:2.3:h:phicomm:k2g:-
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cpe:2.3:h:phicomm:k2p:-
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cpe:2.3:h:phicomm:k3:-
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cpe:2.3:h:phicomm:k3c:-
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cpe:2.3:o:phicomm:k2_firmware:-
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cpe:2.3:o:phicomm:k2_firmware:22.5.9.163
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cpe:2.3:o:phicomm:k2g_firmware:-
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cpe:2.3:o:phicomm:k2g_firmware:22.6.3.20
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cpe:2.3:o:phicomm:k2p_firmware:-
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cpe:2.3:o:phicomm:k2p_firmware:20.4.1.7
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cpe:2.3:o:phicomm:k3_firmware:-
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cpe:2.3:o:phicomm:k3_firmware:21.5.37.246
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cpe:2.3:o:phicomm:k3c_firmware:-
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cpe:2.3:o:phicomm:k3c_firmware:32.1.15.93