BSD fwdev.c integer overflow

bsd-fwdev-integer-overflow (30347) The risk level is classified as MediumMedium Risk

Description:

Multiple BSD systems are vulnerable to an integer overflow in the fw_ioctl() function of fwdev.c. A local attacker could send specially-crafted arguments to the fw_ioctl() function to read the system memory and obtain sensitive information.

*CVSS:

Base Score: 2.5
  Access Vector: Local
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 2
  Exploitability: Unproven
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated

Consequences:

Obtain Information

Remedy:

For FreeBSD:
Refer to FreeBSD-SA-06:25.kmem for patch, upgrade, or workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • BSDaemon Advisory 15/11/2006 : FreeBSD/NetBSD/TrustedBSD*/DragonFlyBSD all versions FireWire IOCTL kernel integer overflow information disclousure.
  • FreeBSD-SA-06:25.kmem : Kernel memory disclosure in firewire(4).
  • MidnightBSD Web site: MidnightBSD Project.
  • TrustedBSD Web site: TrustedBSD - Home.
  • BID-21089: Multiple BSD Vendor FireWire IOCTL Local Integer Overflow Vulnerability
  • CVE-2006-6013: Integer signedness error in the fw_ioctl (FW_IOCTL) function in the FireWire (IEEE-1394) drivers (dev/firewire/fwdev.c) in various BSD kernels, including DragonFlyBSD, FreeBSD 5.5, MidnightBSD 0.1-CURRENT before 20061115, NetBSD-current before 20061116, NetBSD-4 before 20061203, and TrustedBSD, allows local users to read arbitrary memory contents via certain negative values of crom_buf->len in an FW_GCROM command. NOTE: this issue has been labeled as an integer overflow, but it is more like an integer signedness error.
  • OSVDB ID: 30291: Multiple BSD FireWire fwdev.c fw_ioctl() Function Local Overflow
  • SA22917: FreeBSD "fw_ioctl()" Integer Overflow Vulnerability
  • SECTRACK ID: 1017344: BSD FireWire Driver fw_ioctl() Integer Signedness Error Lets Local Users Read Kernel Memory

Platforms Affected:

  • DragonFlyBSD DragonFly BSD
  • FreeBSD FreeBSD
  • MidnightBSD Project MidnightBSD
  • NetBSD NetBSD
  • TrustedBSD Project TrustedBSD

Reported:

Nov 15, 2006

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