Microsoft has released a security bulletin and software updates to address the Microsoft Windows NDProxy local code execution vulnerability.
A vulnerability in the NDProxy driver component of the Microsoft Windows kernel could allow a local attacker to execute arbitrary code with elevated privileges.
The vulnerability is due to insufficient validation of user-supplied input. A local attacker could exploit the vulnerability by executing a malicious program designed to invoke system calls that contain malicious values. If successful, the attacker could gain elevated privileges on the system and execute arbitrary code with kernel-level privileges.
Proof-of-concept code that exploits this vulnerability is publicly available.
Microsoft has confirmed the vulnerability and released software updates.
The following Microsoft products are vulnerable:
Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
To exploit the vulnerability, the attacker must have authenticated access to the local system. This access requirement could limit the likelihood of a successful exploit.
Reports indicate that the vulnerability is being actively exploited in the wild in conjunction with an Adobe Reader exploit that appears to target a patched vulnerability in Adobe Reader. The exploit targets Adobe Reader versions 9.5.4, 10.1.6, and 11.0.02 and prior on Windows XP SP3. The latest versions of Adobe Reader are not vulnerable to an exploit.
Attackers are likely exploiting the vulnerability in the Windows kernel to gain additional privileges after malicious software has already been placed on the system through another exploit, such as the reported Adobe Reader vulnerability.
Microsoft has released a security bulletin available at the following link: MS14-002
Microsoft has released a security advisory at the following link: 2914486
A local attacker could exploit the vulnerability to gain elevated privileges and execute arbitrary code with kernel-level privileges on a targeted system, possibly resulting in complete system compromise.
The vulnerability is in the NDProxy.sys kernel driver of the affected operating system versions. The driver component improperly validates user-supplied input in requests.
A local attacker could exploit the vulnerability by executing a malicious program designed to send malicious requests to the Windows kernel on the targeted system. The improper processing of malicious requests could allow the attacker to execute arbitrary code with the privileges of the Windows kernel.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to local system access.
Administrators may consider disabling or rerouting the NDProxy service to Null.sys as described in the Microsoft security advisory.
Administrators may consider configuring the Microsoft Enhanced Mitigation Experience Toolkit (EMET) to work with the affected software.
Administrators are advised to monitor critical systems.
Microsoft customers can obtain updates directly by using the links in
the security bulletin. These updates are also distributed by Windows
automatic update features and available on the Microsoft Update
service. Microsoft Windows Server Update Services (WSUS), Systems
Management Server, and System Center Configuration Manager can assist
administrators in deploying software updates.
Version 2, December 5, 2013, 11:13 AM: Proof-of-concept code that demonstrates an exploit of the Microsoft Windows NDProxy local code execution vulnerability is publicly available.
Version 1, December 2, 2013, 9:44 PM: Microsoft Windows contains a vulnerability that could allow a local attacker to execute arbitrary code. Updates are available.
Home Edition SP3 | Professional Edition SP3 | Professional Edition, 64-bit (Itanium) SP3 | Professional x64 (AMD/EM64T) SP3 | Tablet PC Edition SP3
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