CVE-2024-49085 in Windows
Summary
by MITRE • 12/12/2024
Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 02/20/2025
The Windows Routing and Remote Access Service (RRAS) represents a critical component within Microsoft's networking infrastructure that enables various remote access functionalities including dial-up, virtual private network connections, and routing services. This service operates with elevated privileges and maintains extensive network connectivity capabilities, making it a prime target for adversaries seeking persistent access or privilege escalation within network environments. The vulnerability identified as CVE-2024-49085 specifically affects the RRAS implementation and presents a remote code execution threat that can be exploited without authentication, significantly broadening the attack surface for malicious actors targeting Windows-based networks.
This vulnerability stems from improper input validation within the RRAS service handling of specific network protocol requests. The flaw manifests when the service processes malformed or specially crafted network packets that trigger an overflow condition in memory management routines. The technical implementation fails to adequately sanitize incoming data streams, particularly those related to routing protocols and remote access authentication mechanisms. According to CWE classification, this vulnerability maps to CWE-121 which describes stack-based buffer overflow conditions, while the attack pattern aligns with ATT&CK technique T1203 - Exploitation for Client Execution and T1068 - Exploitation for Privilege Escalation. The root cause lies in insufficient bounds checking and memory management practices within the service's network processing pipeline.
The operational impact of CVE-2024-49085 extends beyond simple remote code execution, as the RRAS service typically runs with SYSTEM privileges on Windows systems. Successful exploitation can result in complete system compromise, enabling attackers to establish persistent backdoors, escalate privileges to domain administrator levels, or use the compromised system as a pivot point for lateral movement throughout the network. Network defenders face particular challenges since RRAS services may be enabled on servers that are not actively monitored for unusual network traffic patterns, and the vulnerability can be exploited from external networks without requiring valid credentials. The attack surface includes not only traditional corporate networks but also cloud environments where RRAS functionality might be deployed for hybrid connectivity solutions.
Mitigation strategies for this vulnerability must address both immediate protection and long-term security posture improvements. Microsoft has released security patches that correct the input validation flaws in RRAS service implementations, and organizations should prioritize deployment of these updates across all affected systems. Network segmentation approaches including firewall rules that restrict access to RRAS service ports and implementing zero-trust network principles can significantly reduce exploitation risks. Additionally, monitoring for unusual network traffic patterns on ports commonly used by RRAS services, such as TCP 1723 for PPTP and UDP 1701 for L2TP, provides early detection capabilities. Security teams should also consider disabling RRAS functionality entirely on systems where it is not required, following the principle of least privilege. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing comprehensive network monitoring to detect anomalous behavior that could indicate exploitation attempts.