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Research > Zero-Day Tracker > 20130411

MS13-036 (KB2823324) Windows Kernel-Mode NTFS Drivers

Date Disclosed:
4/11/2013

Date Patched:
4/23/2013

Vendor:
Microsoft

Affected Software:

Windows XP SP3 and prior
Windows Server 2003 SP2 and prior
Windows Vista SP2 and prior
Windows Server 2008 SP2 and prior
Windows 7 SP1 and prior
Windows Server 2008 R2 SP1 and prior
Windows 8
Windows Server 2012
Windows RT

Description:
Microsoft Windows contains a vulnerability that may allow an attacker to elevate their privileges to that of the kernel, by leveraging a NULL pointer derefence within the kernel-mode NTFS driver. To successfully exploit this vulnerability, an attacker must craft a malicious NTFS drive and mount it on a vulnerable target machine. This issue is normally only exploitable for local users running as administrator as administrators are the only user group that can mount an NTFS drive. However, a non-administrator may mount an NTFS volume via removable drive, which does not require privilege elevation. KB2823324 that addressed this issue, included in MS13-036, was pulled due to fatal errors occuring as a result of an incompatability. 

Severity:
High

Code Execution:
Yes.

Impact:
Remote Privilege Escalation
Attackers may only leverage this vulnerability if the target user is running as an administrator, or if they are within physical proximity of a vulnerable system that allows removable storage to be mounted. Attackers who successfully exploit this vulnerability will be able to execute code on the vulnerable system with the same rights as the system kernel.

Mitigation:
No reasonable mitigations are currently available. 

Protection:
BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 18656 - Microsoft Windows Kernel-Mode Drivers (2829996) - KB2823324

Links:

Status:
2013-04-09 - MS13-036 released.
2013-04-11 - KB2823324 from MS13-036 pulled.
3013-04-23 - Microsoft re-releases MS13-036 with updated KB2840149, which addresses the NTFS kernel-mode driver vulnerability.

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