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OpenSSH 'sshd' Challenge Response Authentication Buffer Overflow Vulnerability
Information
Severity
Severity
Critical
Family
Family
Buffer overflow
CVSSv2 Base
CVSSv2 Base
10.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
12 years ago
Modified
Modified
4 years ago
Summary
The host is running OpenSSH sshd with ChallengeResponseAuthentication enabled and is prone to buffer overflow vulnerability.
Insight
Insight
The flaw is due to an error in handling a large number of responses during challenge response authentication when using PAM modules with interactive keyboard authentication (PAMAuthenticationViaKbdInt).
Affected Software
Affected Software
OpenSSH versions 2.3.1 to 3.3.
Solution
Solution
Upgrade to OpenSSH version 3.4 or later.