CVE-2025-24067: Windows 10 1507 Privilege Escalation Flaw

CVE-2025-24067 Overview

CVE-2025-24067 is a heap-based buffer overflow vulnerability affecting the Microsoft Streaming Service component across a wide range of Windows operating systems. This vulnerability allows an authorized attacker with local access to elevate privileges on the affected system. The flaw exists in memory handling routines within the streaming service, enabling local privilege escalation attacks that could grant attackers SYSTEM-level access.

Critical Impact

An authenticated local attacker can exploit this heap-based buffer overflow to elevate privileges to SYSTEM level, potentially gaining full control of the affected Windows system.

Affected Products

• Microsoft Windows 10 (versions 1507, 1607, 1809, 21H2, 22H2)
• Microsoft Windows 11 (versions 22H2, 23H2, 24H2)
• Microsoft Windows Server 2016, 2019, 2022, 2022 23H2, and 2025

Discovery Timeline

• March 11, 2025 - CVE-2025-24067 published to NVD
• July 3, 2025 - Last updated in NVD database

Technical Details for CVE-2025-24067

Vulnerability Analysis

This vulnerability is classified as CWE-122 (Heap-based Buffer Overflow), a memory corruption vulnerability that occurs when data is written beyond the allocated boundaries of a heap buffer. In the context of the Microsoft Streaming Service, improper validation of buffer sizes during data processing operations allows an attacker to corrupt adjacent heap memory.

The exploitation requires local access and valid credentials on the target system. Once authenticated, an attacker can craft malicious input that triggers the buffer overflow condition within the streaming service. Successful exploitation results in arbitrary code execution in the context of a higher-privileged process, effectively allowing the attacker to escalate from a standard user to SYSTEM-level privileges.

The local attack vector requires the attacker to already have some level of access to the system, either through physical access, remote desktop, or a compromised low-privileged account. No user interaction is required once the attacker has established local access.

Root Cause

The vulnerability stems from insufficient bounds checking in the Microsoft Streaming Service when processing input data. The service fails to properly validate the size of data being written to heap-allocated buffers, allowing an attacker to overflow the buffer boundaries. This heap overflow can corrupt adjacent memory structures, including function pointers or other critical data, enabling control flow hijacking and arbitrary code execution with elevated privileges.

Attack Vector

The attack requires an authenticated user with local access to the system. The attacker can exploit this vulnerability by sending specially crafted requests or input to the Microsoft Streaming Service that causes the heap buffer overflow. The vulnerability does not require user interaction beyond the attacker's own actions.

The attack flow typically involves:

1. Attacker gains local access with standard user credentials
2. Attacker crafts malicious input targeting the streaming service's vulnerable buffer handling
3. The heap overflow corrupts memory structures enabling privilege escalation
4. Attacker achieves SYSTEM-level code execution

Due to the sensitive nature of this vulnerability and the lack of verified proof-of-concept code, technical exploitation details are not provided. Refer to the Microsoft Security Update Guide for additional technical information.

Detection Methods for CVE-2025-24067

Indicators of Compromise

• Unexpected crashes or instability in the Microsoft Streaming Service
• Anomalous privilege elevation events in Windows Security event logs
• Unusual process creation from streaming service components with elevated privileges
• Memory access violations logged in application event logs

Detection Strategies

• Monitor for unusual process creation events where child processes are spawned with SYSTEM privileges from streaming service components
• Implement memory protection monitoring to detect heap corruption attempts
• Enable Windows Defender Exploit Guard with heap protection policies
• Deploy endpoint detection and response (EDR) solutions capable of detecting privilege escalation patterns

Monitoring Recommendations

• Enable detailed Windows Security auditing for privilege escalation events (Event ID 4672, 4673)
• Monitor process integrity levels for unexpected transitions from medium to high/system integrity
• Configure SIEM alerts for streaming service process anomalies
• Utilize SentinelOne's behavioral AI engine to detect exploitation attempts and post-exploitation activities

How to Mitigate CVE-2025-24067

Immediate Actions Required

• Apply the latest Microsoft security updates addressing CVE-2025-24067 immediately
• Restrict local access to systems running affected Windows versions
• Implement the principle of least privilege to minimize the impact of potential exploitation
• Enable Windows Defender Credential Guard and other virtualization-based security features where supported

Patch Information

Microsoft has released security updates to address this vulnerability. System administrators should obtain the appropriate patches from the Microsoft Security Update Guide. The patches address the improper bounds checking in the Microsoft Streaming Service by implementing proper input validation and buffer size verification.

Organizations should prioritize patching based on system exposure and criticality, with internet-facing and business-critical systems receiving updates first.

Workarounds

• Limit local access to affected systems to only trusted and necessary users
• Implement application control policies to restrict unauthorized executables
• Consider disabling the Microsoft Streaming Service if not required for business operations
• Deploy network segmentation to limit lateral movement potential if exploitation occurs

# Verify Microsoft Streaming Service status and consider disabling if not required
sc query MSSVC
sc config MSSVC start= disabled
sc stop MSSVC