C-Kermit 8.0.200 before 11.1.515 contains a path traversal vulnerability in doftpget() in ckcftp.c that allows malicious FTP servers to write files outside the intended directory. Attackers can return absolute paths, tilde names, or dot-dot components in NLST or MLSD listings during MGET /RECURSIVE to overwrite files like .bashrc, leading to code execution.
https://github.com/OpenKermit/ckermit/security/advisories/GHSA-vhrv-7jrq-95qj
https://github.com/OpenKermit/ckermit/releases/tag/v11.1.515
https://github.com/OpenKermit/ckermit/commit/9b1809b2ce2bcec08b7285deb1b7f0bcbef6a052
https://github.com/OpenKermit/ckermit/blob/v11.0.514/ckcftp.c#L7668
Published: 2026-11-13
Updated: 2026-11-13
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N
Severity: High
Base Score: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Severity: Medium
Base Score: 6.9
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Severity: Medium
EPSS: 0.00407