CVE-2024-10929: Medium Vulnerability in Arm Cortex-A Firmware

In certain circumstances, an issue in Arm Cortex-A57, Cortex-A72 (revisions before r1p0), Cortex-A73 and Cortex-A75 may allow an adversary to gain a weak form of control over the victim's branch history. This weakness poses a medium severity risk, with a CVSS score of 5.1. Organizations utilizing affected firmware components must address this vulnerability to avoid potential exploitation.

Risk to organizations includes the potential for attackers to manipulate execution flow, which could lead to unauthorized access or data leakage. Although no public exploit has been confirmed, the nature of this vulnerability necessitates immediate attention from security teams.

Organizations should prioritize patching immediately, especially those operating systems that rely on the affected Cortex-A firmware components. It is crucial to monitor for any signs of exploitation and to ensure that robust security measures are in place.

The vulnerability is classified under CWE-203, indicating that it can lead to exposure of sensitive information. The attack vector for this vulnerability is local, requiring an adversary to have local access to the system. This increases the risk for devices in multi-user environments.

Given the nature of the vulnerability and its implications, organizations must act swiftly to mitigate any associated risks and ensure their systems remain secure.

Vulnerability Details

The official description states, 'In certain circumstances, an issue in Arm Cortex-A57, Cortex-A72 (revisions before r1p0), Cortex-A73 and Cortex-A75 may allow an adversary to gain a weak form of control over the victim's branch history.' The CVSS score for this vulnerability is 5.1, categorized as medium severity. This score reflects the potential impact of the vulnerability on affected systems.

The affected products include the following firmware components: Cortex-A57, Cortex-A72, Cortex-A73, and Cortex-A75. The publication date of this vulnerability is January 22, 2025.

Technical Analysis

The root cause of this vulnerability lies in the design of the affected Cortex-A firmware components. The weak form of control over branch history can be exploited when an attacker has local access to the system. The attack complexity is assessed as low, meaning that the barrier to exploitation is minimal. No special privileges are required, and user interaction is not necessary.

This vulnerability primarily impacts confidentiality and integrity, with low impacts on both. However, there is no impact on the availability of the system. Attackers may leverage this vulnerability to manipulate execution flow, potentially leading to unauthorized access to sensitive information.

Risk & Impact Analysis

The real-world deployment risk for this vulnerability is significant, especially in environments where multiple users have local access to devices. The potential for attackers to manipulate branch history could lead to unauthorized access or data leakage, which poses a considerable risk to organizations.

Organizations should assess their exposure to this vulnerability, particularly in contexts where the affected Cortex-A firmware is deployed. The urgency for remediation is moderate, given the CVSS score of 5.1, indicating that it should be addressed in the priority patch cycle.

Considering the low exploitability and absence of public exploits, organizations should still be proactive in their security posture and monitor for any signs of potential abuse.

Affected Versions

Affected versions include Cortex-A57 firmware, Cortex-A72 firmware, Cortex-A73 firmware, and Cortex-A75 firmware. If version information is missing, it is advisable to state that all versions prior to vendor patch are affected.

Mitigation & Remediation

Organizations should prioritize patching immediately and ensure they upgrade to the latest available firmware versions from Arm. If a patch is not available, consider implementing configuration hardening and network controls to mitigate potential risks.

For ongoing security assessment, organizations can utilize penetration testing to evaluate their defenses against this and other vulnerabilities.

Detection Guidance

Security teams should monitor for unusual behavior patterns that may indicate exploitation attempts. Log indicators related to firmware access and changes to branch history should be scrutinized.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability could lead to trends in similar weaknesses across firmware components. It serves as a reminder for security teams to constantly evaluate their defensive strategies.

Organizations may benefit from reviewing vulnerability management programs to ensure they are identifying and addressing issues effectively.

Additionally, engaging in penetration testing methodology can provide insights into potential vulnerabilities and their exploitability.

Security teams should also consider the role of security testing best practices in mitigating the risks associated with vulnerabilities like CVE-2024-10929.