Quantum Secular Labs / Blog / Advisories

CVE-2003-0972: GNU Screen: Buffer overflow

CVE-2003-0972 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects GNU Screen. 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 ansi.c for GNU screen 4.0.1 and earlier, and 3.9.15 and earlier, allows local users to execute arbitrary code via a large number of ";" (semicolon) characters in escape sequences, 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

  • GNU Screen: 3.9.4; 3.9.8; 3.9.9; 3.9.10; 3.9.11; 3.9.13; 3.9.15; 4.0.1

References