CVE-2019-0803 is classified as a high-severity privilege escalation vulnerability affecting multiple versions of Microsoft Windows. This vulnerability allows attackers to leverage the Win32k component's failure to properly handle objects in memory, potentially enabling them to run code in kernel mode. The CVSS score of 7.8 highlights the critical nature of this issue, emphasizing the need for organizations to prioritize remediation.
Risk to organizations includes unauthorized access to sensitive data and system control, making it imperative for defenders to act swiftly. Given that this vulnerability has known exploits, organizations should prioritize patching immediately to mitigate associated risks.
With the vulnerability publicly disclosed and actively tracked in the Known Exploited Vulnerabilities (KEV) catalog, organizations need to be aware of the urgency surrounding this issue. The exploitation status signifies that threat actors are likely attempting to exploit this vulnerability, further emphasizing the necessity for immediate action.
In light of these factors, organizations should focus on understanding the implications of CVE-2019-0803 and ensure that they implement the necessary security updates without delay.
Vulnerability Details
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0859. It affects multiple Windows versions including Windows 10, Windows 7, Windows 8.1, and various Windows Server editions.
The CVSS score for this vulnerability is 7.8, indicating a high severity level. This score is derived from factors such as a local attack vector, low attack complexity, low privileges required for exploitation, and significant impacts on confidentiality, integrity, and availability.
The vulnerability was published on April 9, 2019, and is classified under high severity due to its potential impact on affected systems.
Technical Analysis
The root cause of CVE-2019-0803 stems from the Win32k component's inability to correctly manage objects in memory, leading to potential privilege escalation. The attack vector is local, indicating that an attacker must have access to the target machine. The attack complexity is low, meaning that successful exploitation does not require advanced skills or conditions.
Exploitation requires low privileges, and no user interaction is necessary. This enhances the vulnerability's risk as attackers can leverage it with minimal requirements, potentially leading to significant impacts across confidentiality, integrity, and availability.
Risk & Impact Analysis
Real-world deployment risk is high, especially for organizations utilizing affected versions of Windows. Attackers may exploit this vulnerability to gain unauthorized access, leading to potential data breaches and loss of system integrity. The blast radius could include sensitive data exposure, disruption of services, and long-term reputational damage.
Organizations should assess the potential impacts of this vulnerability within their environments and prioritize remediation efforts based on the CVSS score and the known exploitation status. Given the high EPSS score of 0.898, indicating that exploitation is likely, organizations must treat this vulnerability as critical.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The following versions of Microsoft Windows are affected by CVE-2019-0803: Windows 10 (versions 1507, 1607, 1703, 1709, 1803, 1809), Windows 7, Windows 8.1, Windows RT 8.1, Windows Server (versions 1709, 1803, 2008, 2012, 2016, 2019). Organizations should ensure that all versions prior to vendor patch are updated.
Mitigation & Remediation
To remediate CVE-2019-0803, organizations should apply the necessary patches provided by Microsoft. For detailed instructions on applying these updates, please refer to the security update guidance from Microsoft. In cases where the patch cannot be applied immediately, organizations may consider implementing additional network controls and monitoring to detect potential exploitation attempts.
Detection Guidance
Monitoring for unusual behavior related to the Win32k component can help detect potential exploitation of this vulnerability. Organizations should implement logging to capture relevant events and identify behavioral anomalies that may indicate an attack.
AppSecure Threat Intelligence Insight
CVE-2019-0803 highlights the ongoing challenges organizations face in securing Windows environments. The patterns of exploitation for this vulnerability demonstrate the need for robust patch management and threat detection capabilities. Security teams should ensure that they are prepared to respond to similar vulnerabilities in the future.
For a comprehensive understanding of vulnerability management, organizations may refer to the vulnerability management program framework and consider integrating it into their security posture.
Organizations should also stay informed about trends in privilege escalation threats by exploring relevant articles such as the privilege escalation cybersecurity guide to enhance their defensive strategies.
Finally, engaging in red teaming exercises can provide valuable insights into the effectiveness of security controls against such vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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