Quantum Secular Labs / Blog / Advisories

CVE-2003-0248: The mxcsr code in Linux kernel 2.4 allows attackers to modify CPU state registers via a malformed address.

CVE-2003-0248 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Red Hat Linux. 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

The mxcsr code in Linux kernel 2.4 allows attackers to modify CPU state registers via a malformed address.

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

  • Red Hat Linux: 7.1; 7.2; 7.3; 8.0; 9.0

References