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Advisories

C-Kermit 11.0.506 before 11.1.515 RECEIVE CONFIRM Bypass via Recursive GET

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Severity
medium
Date
Affecting

  • C-Kermit >= 11.0.506, < 11.1.515

CWE
  • CWE-863 Incorrect Authorization
CVSS
5.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
John Goerzen, John Goerzen
Description
C-Kermit 11.0.506 before 11.1.515 contains a RECEIVE CONFIRM bypass vulnerability that allows malicious Kermit servers to write unrequested files without prompting by abusing recursive GET root computation in ckcfns.c. Attackers can send files such as .ssh/authorized_keys or shell startup files under the current directory, which rq_under_root() accepts silently, enabling persistent access or code execution.

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