CVE-2020-1052 in Windows
Summary
by MITRE
<p>An elevation of privilege vulnerability exists in the way that the ssdpsrv.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.</p> <p>To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.</p> <p>The security update addresses the vulnerability by ensuring the ssdpsrv.dll properly handles objects in memory.</p>
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Analysis
by VulDB Data Team • 02/24/2026
The vulnerability identified as CVE-2020-1052 represents a critical elevation of privilege flaw within the ssdpsrv.dll component of Microsoft Windows operating systems. This vulnerability specifically targets the manner in which the Simple Service Discovery Protocol server service handles memory objects, creating an exploitable condition that allows local authenticated attackers to execute malicious code with elevated privileges. The ssdpsrv.dll module is responsible for implementing the SSDP protocol, which enables device discovery and service announcement within local networks, making it a core component of Windows networking infrastructure.
The technical exploitation of this vulnerability occurs through improper memory handling mechanisms within the ssdpsrv.dll library. When the service processes certain memory objects, it fails to properly validate or sanitize input parameters, leading to potential memory corruption conditions. This flaw falls under the Common Weakness Enumeration category of weak memory management practices, specifically CWE-121, which deals with stack-based buffer overflows, or CWE-122, which addresses heap-based buffer overflows. Attackers can leverage this weakness by crafting malicious applications that interact with the SSDP service, triggering the vulnerable code path and subsequently executing arbitrary code with system-level privileges.
The operational impact of CVE-2020-1052 is severe as it allows local attackers who already possess authentication credentials to escalate their privileges without requiring additional authentication mechanisms. This means that even users with standard user rights can potentially gain administrative access to affected systems, enabling them to install malware, modify system files, access sensitive data, or establish persistent backdoors. The vulnerability particularly affects Windows 10 versions and Windows Server 2019, where the ssdpsrv.dll component is actively running and processing network discovery requests. The attack vector requires only local system access, making it particularly dangerous in environments where users have legitimate access to systems but should not possess administrative privileges.
Microsoft has addressed this vulnerability through a security update that modifies the memory handling procedures within ssdpsrv.dll to properly validate and sanitize all incoming objects before processing. The fix ensures that memory operations adhere to proper bounds checking and input validation protocols, eliminating the conditions that previously allowed privilege escalation. Organizations should prioritize applying this update immediately to protect their systems from exploitation attempts. The mitigation strategy also includes implementing least privilege principles, monitoring for unusual SSDP traffic patterns, and conducting regular security assessments of network services. This vulnerability aligns with the ATT&CK framework's privilege escalation techniques, specifically targeting T1068 which covers "Exploitation for Privilege Escalation" and T1106 which addresses "Execution of Legitimate Tools" as attackers may use legitimate Windows components to carry out their exploits.