CVE-2001-1470: SSH

Medium severity, CVSS 5.0. EPSS: 1.1% chance of exploitation in the next 30 days.

The IDEA cipher as implemented by SSH1 does not protect the final block of a message against modification, which allows remote attackers to modify the block without detection by changing its cyclic redundancy check (CRC) to match the modifications to the message.

Affected products

• SSH SSH: version 1.2.24 only; version 1.2.25 only; version 1.2.26 only; version 1.2.27 only; version 1.2.28 only; version 1.2.29 only; …

Published 2001-01-18. Last modified 2026-06-16.