CVE-2024-41176 in MDP Package
Summary
by MITRE • 08/27/2024
The MPD package included in TwinCAT/BSD allows an authenticated, low-privileged local attacker to induce a Denial-of-Service (DoS) condition on the daemon and execute code in the context of user “root” via a crafted HTTP request.
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Analysis
by VulDB Data Team • 10/01/2024
The vulnerability identified as CVE-2024-41176 affects the MPD package within TwinCAT/BSD systems, representing a critical security flaw that bridges authentication gaps with privilege escalation capabilities. This vulnerability specifically targets the daemon process responsible for media playback services, creating a pathway for attackers to disrupt system operations while simultaneously gaining elevated privileges. The flaw exists within the HTTP request handling mechanism of the MPD service, where inadequate input validation allows maliciously crafted requests to trigger unintended behavior. According to the Common Weakness Enumeration framework, this vulnerability maps to CWE-400, which encompasses "Uncontrolled Resource Consumption" and specifically addresses issues where resource exhaustion occurs due to improper handling of user-provided data. The attack vector requires only local authentication access, making it particularly dangerous in environments where multiple users share system resources or where privilege escalation is not adequately restricted.
The technical implementation of this vulnerability exploits a flaw in how the MPD daemon processes HTTP requests, particularly those containing malformed or specially crafted parameters that cause the service to consume excessive system resources or execute unintended code paths. When an authenticated user sends a malicious HTTP request to the MPD service, the daemon fails to properly validate or sanitize the incoming data, leading to a condition where the service becomes unresponsive or crashes entirely. This resource exhaustion directly manifests as a denial-of-service condition that can be used to disrupt legitimate system operations. More critically, the vulnerability enables code execution with root privileges, meaning that any authenticated user with access to the MPD service can escalate their privileges to the highest system level. The ATT&CK framework categorizes this as a privilege escalation technique under T1068, which involves "Local Privilege Escalation" through exploitation of system vulnerabilities that allow non-privileged users to gain elevated access rights.
The operational impact of CVE-2024-41176 extends beyond simple service disruption, creating a potential gateway for more sophisticated attacks within affected systems. Organizations utilizing TwinCAT/BSD deployments face significant risks as this vulnerability can be leveraged to establish persistent access to critical infrastructure, particularly in industrial control environments where media playback services are integral to system operations. The low privilege requirement means that even users with minimal access rights can trigger the vulnerability, making it particularly concerning for multi-user systems or environments where user access controls are not properly enforced. The root privilege execution capability transforms what might initially appear as a denial-of-service attack into a full system compromise scenario, where attackers can modify system files, install malicious software, or establish backdoors for continued access. Security professionals should note that this vulnerability directly impacts the principle of least privilege, as it allows users to bypass normal access controls and execute arbitrary commands with the highest system permissions.
Mitigation strategies for CVE-2024-41176 should prioritize immediate patch deployment from the vendor, as the vulnerability represents a critical risk that can be exploited without requiring advanced technical skills. Organizations should implement network segmentation to limit access to MPD services and restrict HTTP request handling to trusted network segments only. Additionally, mandatory access controls should be enforced to prevent unauthorized users from accessing the MPD daemon, while monitoring systems should be deployed to detect unusual patterns in HTTP request handling or resource consumption that might indicate exploitation attempts. Security teams should also consider disabling unnecessary MPD services if they are not required for business operations, thereby reducing the attack surface. The vulnerability highlights the importance of input validation and proper resource management in daemon processes, emphasizing that all user-provided data must be rigorously sanitized before processing to prevent similar exploitation vectors. Regular security assessments and vulnerability scanning should be implemented to identify other potential weaknesses in system components that might provide similar privilege escalation pathways, particularly focusing on services that handle network communications with elevated privileges.