Severity: HIGH
Description: The T-Head XuanTie C910 CPU in the TH1520 SoC and the T-Head XuanTie C920 CPU in the SOPHON SG2042 have instructions that allow unprivileged attackers to write to arbitrary physical memory locations, aka GhostWrite.
CVSS Score: N/A
D
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1. Risk Assessment
The vulnerability identified as CVE-2024-44067, also known as GhostWrite, affects the T-Head XuanTie C910 CPU in the TH1520 SoC and the T-Head XuanTie C920 CPU in the SOPHON SG2042. This flaw allows unprivileged attackers to write to arbitrary physical memory locations, leading to a severe compromise of system integrity, confidentiality, and availability. The CVSS v3.1 score of 8.4 (High) underscores the critical nature of this vulnerability, with a local attack vector and no privileges required for exploitation.
The likelihood of exploitation is moderate due to the technical complexity of leveraging this vulnerability, as indicated by the low EPSS score of 0.000430000. However, the ease of exploitation is high once an attacker gains local access, as no user interaction or elevated privileges are required. The potential impacts are severe: attackers could manipulate memory to execute arbitrary code, escalate privileges, or cause system crashes, leading to data breaches, service disruptions, and reputational damage.
2. Potential Attack Scenarios
An attacker with local access to a system running the affected CPUs could exploit this vulnerability to write malicious data to arbitrary memory locations. For example, an attacker could overwrite critical kernel structures or application memory to gain elevated privileges or execute arbitrary code. The attack process would involve the following steps:
- The attacker gains local access to the system, either through physical access or by exploiting another vulnerability to achieve local execution.
- The attacker crafts a payload designed to exploit the GhostWrite vulnerability, targeting specific memory locations.
- The payload is executed, allowing the attacker to write arbitrary data to physical memory, potentially overwriting critical system structures or injecting malicious code.
- The outcome could include privilege escalation, data exfiltration, or a complete system compromise, depending on the attacker's objectives.
This scenario highlights the potential for significant damage, including unauthorized access to sensitive data, disruption of critical services, and long-term reputational harm.
3. Mitigation Recommendations
To mitigate the risks associated with CVE-2024-44067, the following actions are recommended:
- Apply patches or firmware updates from the vendor as soon as they become available. Monitor vendor communications for updates related to this vulnerability.
- Restrict local access to systems running the affected CPUs to trusted personnel only. Implement strict access controls and monitor for unauthorized access attempts.
- Deploy intrusion detection and prevention systems (IDPS) to detect and block potential exploitation attempts.
- Conduct regular security audits and vulnerability assessments to identify and address potential weaknesses in the environment.
- For further information, refer to the official vulnerability disclosure at https://ghostwriteattack.com and monitor the PacketStorm Security page for updates: https://packetstormsecurity.com/search/?q=CVE-2024-44067.
4. Executive Summary
CVE-2024-44067, also known as GhostWrite, is a critical vulnerability affecting the T-Head XuanTie C910 and C920 CPUs. It allows unprivileged attackers to write to arbitrary physical memory locations, posing significant risks to system integrity, confidentiality, and availability. With a CVSS score of 8.4, this vulnerability is highly severe and could lead to privilege escalation, data breaches, and service disruptions.
While the likelihood of exploitation is currently moderate, the potential impact is severe, making it essential to address this vulnerability promptly. Immediate actions include applying vendor patches, restricting local access, and deploying monitoring tools to detect exploitation attempts. Organizations using affected systems should prioritize mitigation efforts to protect critical assets and maintain operational resilience. Addressing this vulnerability is crucial to safeguarding sensitive data, ensuring business continuity, and maintaining stakeholder trust.