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Advisories

C-Kermit 8.0.200 before 11.1.515 Missing Hostname Verification in AUTHENTICATION SSL

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Severity
high
Date
Affecting

  • C-Kermit >= 8.0.200, < 11.1.515

CWE
  • CWE-297 Improper Validation of Certificate with Host Mismatch
CVSS
7.6
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
John Goerzen, John Goerzen
Description
C-Kermit 8.0.200 before 11.1.515 contains an improper certificate validation vulnerability that allows machine-in-the-middle attackers to impersonate Telnet servers because ssl_reply() never calls ssl_check_server_name(). Attackers can refuse START-TLS, offer Telnet AUTHENTICATION SSL, and present any trusted CA certificate to capture user credentials and session data.

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