CVE-2025-24067 in Windows
Summary
by MITRE • 03/11/2025
Heap-based buffer overflow in Microsoft Streaming Service allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/02/2025
The vulnerability identified as CVE-2025-24067 represents a critical heap-based buffer overflow within Microsoft Streaming Service that enables authenticated attackers to achieve local privilege escalation. This flaw exists in the memory management handling of streaming service components that process user input or data structures. The vulnerability stems from inadequate bounds checking during heap allocation and data manipulation operations, creating opportunities for malicious code injection. The Microsoft Streaming Service operates with elevated privileges to manage media streaming processes, making it an attractive target for attackers seeking to leverage system-level access. The buffer overflow occurs when the service receives malformed or excessively large data inputs that exceed allocated memory boundaries, leading to memory corruption that can be exploited to execute arbitrary code with higher privileges.
The technical exploitation of this vulnerability follows established patterns for heap-based buffer overflow attacks where attackers manipulate memory layout to overwrite critical data structures or function pointers. The flaw operates within the streaming service's memory management subsystem, specifically affecting how heap allocations are handled during data processing operations. When legitimate user processes interact with the streaming service, they can trigger the overflow condition through carefully crafted input sequences that cause memory corruption. The vulnerability's classification as heap-based indicates that the overflow occurs in dynamically allocated memory regions rather than stack-based buffers, making exploitation more complex but potentially more persistent. This type of vulnerability typically relates to CWE-121 heap-based buffer overflow category, which encompasses memory corruption issues in heap management operations.
The operational impact of CVE-2025-24067 extends beyond simple privilege escalation as it provides attackers with persistent access to system resources and potential lateral movement capabilities. Once successfully exploited, the elevated privileges allow attackers to modify system configurations, install malicious software, access sensitive data repositories, and maintain long-term system control. The local privilege escalation aspect means that attackers must first authenticate to the system, but the subsequent elevation to system-level privileges creates a significant security risk. This vulnerability affects systems where Microsoft Streaming Service is actively running and can be particularly dangerous in enterprise environments where streaming services are commonly used for media processing. The attack vector requires authenticated access, which reduces immediate exposure but still presents a serious threat to systems with compromised user accounts.
Mitigation strategies for CVE-2025-24067 should prioritize immediate patch deployment from Microsoft as the primary defense mechanism. Organizations must implement comprehensive monitoring for unusual privilege escalation activities and anomalous streaming service behavior. Network segmentation and access control measures can limit potential exploitation by restricting access to systems running streaming services. The implementation of application whitelisting policies can prevent unauthorized code execution even if exploitation occurs. Security teams should conduct regular vulnerability assessments focusing on heap management and memory corruption vulnerabilities within streaming and media processing components. Additionally, system hardening measures including disabling unnecessary streaming services, implementing least privilege access controls, and maintaining up-to-date security patches across all system components can significantly reduce exploitation risk. The vulnerability's characteristics align with ATT&CK technique T1068 for local privilege escalation, emphasizing the need for comprehensive endpoint protection and privilege management controls.