Microsoft Windows Kernel Privilege Escalation Vulnerability [CVE-2019-0881]

CVE Number – CVE-2019-0881

A vulnerability in the Microsoft Windows kernel could allow a local attacker to escalate privileges on a targeted system.

The vulnerability exists because the affected software improperly performs cryptographic key enumeration. An attacker could exploit the vulnerability by accessing the system and executing an application that submits malicious input to the affected software. A successful exploit could allow the attacker to escalate privileges and completely compromise the system.

Microsoft confirmed the vulnerability and released software updates.

Analysis

  • To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.

    Microsoft addressed this vulnerability by correcting how the affected software handles key enumeration.

Safeguards

  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to have network access.

    Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.

    Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

    Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

    Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.

    Administrators are advised to monitor affected systems.

Vendor Announcements

Fixed Software

  • Microsoft customers can obtain updates directly by using the links in theĀ Microsoft Security Update Guide. These updates are also distributed by Windows automatic update features and are available from the Microsoft Update Catalog. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.

Jason Davies

UK based technology professional, with an interest in computer security and telecoms.

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