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Advisories

Fclairamb ftpserverlib through 0.32.4 Cleartext FTPES Data Transfer via PROT P

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Severity
medium
Date
Affecting

  • ftpserverlib <= 0.32.4

CWE
  • CWE-319 Cleartext Transmission of Sensitive Information
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
Che Agg Truvat, drakkan
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.

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