CVE-1999-1085

Medium CVSS 5

Published 1998-06-12 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-1085, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

SSH 1.2.25, 1.2.23, and other versions, when used in in CBC (Cipher Block Chaining) or CFB (Cipher Feedback 64 bits) modes, allows remote attackers to insert arbitrary data into an existing stream between an SSH client and server by using a known plaintext attack and computing a valid CRC-32 checksum for the packet, aka the "SSH insertion attack."

Sources

NVD record for CVE-1999-1085

CVSS vector: AV:N/AC:L/Au:N/C:N/I:P/A:N