CVE-2020-0763 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when Windows Defender Security Center handles certain objects in memory.To exploit the vulnerability, an attacker would first have to log on to the system, aka 'Windows Defender Security Center Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0762.
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Analysis
by VulDB Data Team • 04/10/2024
The vulnerability identified as CVE-2020-0763 represents a critical elevation of privilege flaw within Windows Defender Security Center, a core component of Microsoft's Windows operating system security infrastructure. This vulnerability specifically manifests during the handling of certain objects in memory, creating a potential pathway for malicious actors to escalate their privileges from standard user level to system level access. The flaw exists within the memory management processes of the security center component, which is responsible for monitoring and managing Windows Defender's operational parameters and security policies.
The technical exploitation of this vulnerability requires an initial foothold through user authentication, meaning an attacker must first establish a valid login session on the target system before attempting to leverage the privilege escalation mechanism. This prerequisite aligns with common attack methodologies where adversaries typically gain initial access through phishing, credential theft, or other social engineering techniques before pursuing more sophisticated attacks. The memory handling flaw likely involves improper validation or manipulation of object references, potentially allowing for memory corruption or object reuse scenarios that can be exploited to execute arbitrary code with elevated privileges.
From an operational impact perspective, this vulnerability poses significant risk to enterprise environments where Windows Defender Security Center is actively deployed and monitored. The ability to escalate privileges without requiring administrative credentials creates a serious threat vector that could enable attackers to bypass traditional security controls, access restricted system resources, and potentially establish persistent access within the network. The vulnerability's relationship to CVE-2020-0762 demonstrates that Microsoft identified multiple related issues within the same security component, suggesting a broader architectural weakness in how Windows Defender handles memory objects and security contexts. Organizations running affected Windows versions would face potential compromise of their endpoint security posture, as the security center itself becomes a potential attack surface for privilege escalation.
Security professionals should note that this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and may also relate to CWE-125, indicating out-of-bounds read vulnerabilities in memory handling. The ATT&CK framework categorizes this as a privilege escalation technique under the T1068 category, specifically targeting the exploitation of system-level vulnerabilities to gain elevated access. Mitigation strategies should include immediate deployment of Microsoft security patches, implementation of network segmentation to limit lateral movement, and enhanced monitoring of security center processes for anomalous memory behavior. Organizations should also consider implementing additional security controls such as application whitelisting, mandatory access controls, and regular security assessments to reduce the attack surface and prevent exploitation of this and similar vulnerabilities.