Linux Kernel KGDB memory overwrite

kernel-kgdb-memory-overwrite (58840) The risk level is classified as MediumMedium Risk

Description:

Linux Kernel could allow a local attacker to overwrite kernel memory, caused by the failure to perform a security check for kernel page access by fsl_booke_mmu.c in KGDB. A local attacker could exploit this vulnerability to overwrite kernel memory.

*CVSS:

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

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Linux Kernel (2.6.33 or later), available from The Linux Kernel Archives Web site. See References.

References:

  • lkml Mailing List, Mon, 10 May 2010 15:32:42 -0700: kgdb: dont needlessly skip PAGE_USER test for Fsl booke.
  • The Linux Kernel Archives Web site: The Linux Kernel Archives .
  • CVE-2010-1446: arch/powerpc/mm/fsl_booke_mmu.c in KGDB in the Linux kernel 2.6.30 and other versions before 2.6.33, when running on PowerPC, does not properly perform a security check for access to a kernel page, which allows local users to overwrite arbitrary kernel memory, related to Fsl booke.
  • DSA-2053: linux-2.6 -- privilege escalation/denial of service/information leak
  • OSVDB ID: 64842: Linux Kernel KGDB arch/powerpc/mm/fsl_booke_mmu.c Kernel Page Access Check Weakness Arbitrary Memory Overwrite
  • SUSE-SA:2010:031: Linux kernel security update

Platforms Affected:

  • Debian Debian Linux 5.0
  • Linux Kernel 2.6.30
  • Linux Kernel 2.6.30.1
  • Linux Kernel 2.6.30.10
  • Linux Kernel 2.6.30.2
  • Linux Kernel 2.6.30.3
  • Linux Kernel 2.6.30.4
  • Linux Kernel 2.6.30.5
  • Linux Kernel 2.6.30.6
  • Linux Kernel 2.6.30.7
  • Linux Kernel 2.6.30.8
  • Linux Kernel 2.6.30.9
  • Linux Kernel 2.6.31
  • Linux Kernel 2.6.31.1
  • Linux Kernel 2.6.31.10
  • Linux Kernel 2.6.31.11
  • Linux Kernel 2.6.31.12
  • Linux Kernel 2.6.31.13
  • Linux Kernel 2.6.31.2
  • Linux Kernel 2.6.31.3
  • Linux Kernel 2.6.31.4
  • Linux Kernel 2.6.31.5
  • Linux Kernel 2.6.31.6
  • Linux Kernel 2.6.31.7
  • Linux Kernel 2.6.31.8
  • Linux Kernel 2.6.31.9
  • Linux Kernel 2.6.32
  • Linux Kernel 2.6.32.1
  • Linux Kernel 2.6.32.10
  • Linux Kernel 2.6.32.11
  • Linux Kernel 2.6.32.12
  • Linux Kernel 2.6.32.13
  • Linux Kernel 2.6.32.2
  • Linux Kernel 2.6.32.3
  • Linux Kernel 2.6.32.4
  • Linux Kernel 2.6.32.5
  • Linux Kernel 2.6.32.6
  • Linux Kernel 2.6.32.7
  • Linux Kernel 2.6.32.8
  • Linux Kernel 2.6.32.9

Reported:

May 10, 2010

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