CVE-2001-1470: The IDEA cipher as implemented by SSH1 does not protect the final block of a message against modification,...

Security readout for executives and security teams

This is an old SSH1 cryptographic integrity flaw involving the IDEA cipher. If a session uses SSH1 with IDEA, a remote attacker may be able to alter the final block of a message without detection. The sources do not identify affected products, versions, patches, or current exploitation. Likely exposure is limited to environments still permitting SSH protocol 1 with the IDEA cipher. The source bundle lists affected vendor, product, and versions as n/a, so exposure must be validated through configuration and asset review. Treat this as a legacy cryptography hygiene issue unless asset review finds SSH1 with IDEA in use. If present on exposed systems, prioritize removal because it undermines message integrity and may allow undetected session tampering. Mitigation focus: Identify systems that still allow SSH1 or the IDEA cipher.; Check vendor guidance for affected SSH implementations and supported fixes.; Retire SSH1 where possible and require modern SSH protocol configurations..

Prepared

Jun 29, 2026, 22:16 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.