NetBSD display driver denial of service

netbsd-display-driver-dos (36598) The risk level is classified as MediumMedium Risk

Description:

NetBSD is vulnerable to a denial of service, caused by the improper validation of user-supplied input in various display driver functions. By sending a negative or large value using an ioctl call, a local attacker could exploit this vulnerability to gain unauthorized access to arbitrary memory locations, resulting in a system panic.

*CVSS:

Base Score: 2.1
  Access Vector: Local
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 1.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Refer to NetBSD-SA2007-006 for patch, upgrade, or suggested workaround information. See References.

References:

  • NetBSD-SA2007-006: Local panics in display driver code.
  • The NetBSD Project Web site: The NetBSD Project.
  • BID-25682: NetBSD Vga_allocattr Local Denial of Service Vulnerability
  • CVE-2007-3654: The display driver allocattr functions in NetBSD 3.0 through 4.0_BETA2, and NetBSD-current before 20070728, allow local users to cause a denial of service (panic) via a (1) negative or (2) large value in an ioctl call, as demonstrated by the vga_allocattr function.
  • OSVDB ID: 40810: NetBSD Display Driver allocattr Functions ioctl Call Local DoS
  • SECTRACK ID: 1018693: NetBSD Display Driver Bug Lets Local Users Deny Service

Platforms Affected:

  • NetBSD NetBSD 3.0
  • NetBSD NetBSD 3.0.1
  • NetBSD NetBSD 3.0.2
  • NetBSD NetBSD 3.1
  • NetBSD NetBSD 4.0 beta2
  • NetBSD NetBSD 4.0 beta

Reported:

Sep 13, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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