National Cyber-Alert System
Vulnerability Summary for CVE-1999-1085
Original release date:06/12/1998
Last revised:09/05/2008
Source:
US-CERT/NIST
Overview
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."
Impact
CVSS Severity (version 2.0):
Impact Subscore:
2.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows unauthorized modification
References to Advisories, Solutions, and Tools
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US-CERT Vulnerability Note: VU#13877
Name: VU#13877
External Source: BUGTRAQ
Name: 19980703 UPDATE: SSH insertion attack
Type: Patch Information
External Source: BUGTRAQ
Name: 19980612 CORE-SDI-04: SSH insertion attack
Type: Advisory; Patch Information
External Source: XF
Name: ssh-insert(1126)
