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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

11 years ago

Modified

Modified

3 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.

Common Vulnerabilities and Exposures (CVE)