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CVE-2002-0640: Openbsd Openssh: Buffer overflow

CVE-2002-0640 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Openbsd Openssh. Per its scoring, it can be exploited over the network, without authentication. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Buffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large number of responses during challenge response authentication when OpenBSD is using PAM modules with interactive keyboard authentication (PAMAuthenticationViaKbdInt).

Severity breakdown

CVSS v2.0 10.0: AV:N/AC:L/Au:N/C:C/I:C/A:C

  • Access vector: Network. Exploitable remotely over the network.
  • Access complexity: Low. No special conditions are required.
  • Authentication: None. No authentication is needed.
  • Confidentiality impact: Complete. Total information disclosure.
  • Integrity impact: Complete. Total loss of integrity.
  • Availability impact: Complete. Total shutdown of the component.

Affected products

  • Openbsd Openssh: 1.2.2; 1.2.3; 2.1; 2.1.1; 2.2; 2.3; 2.5; 2.5.1; 2.5.2; 2.9; 2.9.9; 2.9p1

References