Microsoft Windows 2000 debug registers allow attacker to gain elevated privileges

win2k-debug-elevate-privileges (6590) The risk level is classified as HighHigh Risk

Description:

A vulnerability in the handling of x86 debug registers in Microsoft Windows could allow a local attacker to gain elevated privileges. A local attacker with program execution privileges could use this vulnerability to gain write access to the C:\WINNT\SYSTEM32 and HKCR directories.


Consequences:

Gain Privileges

Remedy:

Apply the Service Pack 2 for Microsoft Windows 2000 (SP2 or later), available from the Microsoft Web site. See References.

References:

  • Georgi Guninski Security Advisory #45: Elevation of privileges with debug registers on Win2K.
  • Microsoft Corporation Web site: Windows 2000 Service Pack 2.
  • BID-2764: MS Windows 2000 Debug Registers Vulnerability
  • CVE-2001-1347: Windows 2000 allows local users to cause a denial of service and possibly gain privileges by setting a hardware breakpoint that is handled using global debug registers, which could cause other processes to terminate due to an exception, and allow hijacking of resources such as named pipes.
  • OSVDB ID: 13437: Microsoft Windows 2000 Debug Register Local Privilege Escalation

Platforms Affected:

  • Microsoft Windows 2000

Reported:

May 24, 2001

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