Linux Kernel LDT denial of service

linux-kernel-ldt-dos (43979) The risk level is classified as LowLow Risk

Description:

Linux Kernel is vulnerable to a denial of service, caused by the improper handling of an LDT buffer size on an x86_64 system. A local attacker could exploit this vulnerability to cause the system to crash or possibly execute arbitrary code on the system with elevated privileges.

Platforms Affected:

  • Linux, Kernel 2.6.25
  • Linux, Kernel 2.6.25.1
  • Linux, Kernel 2.6.25.10
  • Linux, Kernel 2.6.25.2
  • Linux, Kernel 2.6.25.3
  • Linux, Kernel 2.6.25.4
  • Linux, Kernel 2.6.25.5
  • Linux, Kernel 2.6.25.6
  • Linux, Kernel 2.6.25.7
  • Linux, Kernel 2.6.25.8
  • Linux, Kernel 2.6.25.9
  • Novell, OpenSUSE 11.0

Remedy:

Upgrade to the latest version of Linux Kernel (2.6.25.11 or later), available from The Linux Kernel Archives Web site. See References.

Consequences:

Denial of Service

References:

  • The Linux Kernel Archives Web site, The Linux Kernel Archives at http://www.kernel.org/.
  • The Linux Kernel Archives Web site, ChangeLog-2.6.25.11 at http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.11.
  • BID-30351: Linux Kernel x86_64 Kernel LDT 'ldt_desc' Buffer Overflow Vulnerability
  • CVE-2008-3247: The LDT implementation in the Linux kernel 2.6.25.x before 2.6.25.11 on x86_64 platforms uses an incorrect size for ldt_desc, which allows local users to cause a denial of service (system crash) or possibly gain privileges via unspecified vectors.
  • SA31172: Linux Kernel LDT Buffer Size Handling Vulnerability
  • SECTRACK ID: 1020544: Linux Kernel x86_64 LDT Buffer Overflow May Let Local Users Gain Elevated Privileges
  • SUSE-SA:2008:037: Linux kernel security update

Reported:

Jul 22, 2008

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