GHSA-j2x3-vcc8-r98qMediumCVSS 4.8
Fclairamb ftpserverlib through 0.32.4 contains a cleartext transmission vulnerability because...
🔗 CVE IDs covered (1)
📋 Description
Fclairamb ftpserverlib through 0.32.4 contains a cleartext transmission vulnerability because TransferOpen checks only the transferTLS flag set by PROT, not whether the prepared data connection uses TLS. When a client sends PROT P after PASV or PORT, file contents and directory listings cross the network unencrypted, even with mandatory encryption, letting on-path attackers read or modify them.
🔗 References (6)
- https://nvd.nist.gov/vuln/detail/CVE-2026-116844
- https://github.com/fclairamb/ftpserverlib/pull/685
- https://github.com/fclairamb/ftpserverlib/blob/v0.32.4/client_handler.go#L720
- https://github.com/fclairamb/ftpserverlib/blob/v0.32.4/handle_misc.go#L29-L31
- https://www.vulncheck.com/advisories/fclairamb-ftpserverlib-through-0.32.4-cleartext-ftpes-data-transfer-via-prot-p
- https://github.com/advisories/GHSA-j2x3-vcc8-r98q