Quantum Secular Labs / Blog / Advisories

CVE-2004-1008: Putty: Buffer overflow

CVE-2004-1008 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Putty, along with 1 other product in NVD’s configuration data. 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

Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.

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

  • Putty: 0.48; 0.49; 0.50; 0.51; 0.52; 0.53; 0.53b; 0.54; 0.55
  • Tortoisecvs: 1.8

References