Description

CVE-2024-56187 describes a vulnerability in the ppcfw_deny_sec_dram_access function of ppcfw.c that allows for arbitrary reading from Trusted Execution Environment (TEE) memory. This is due to a logic error in the code, and it could result in local information disclosure with System execution privileges. The CVSS score is 0, but the SOCRadar Vulnerability Risk Score (SVRS) is 30, which suggests that while the exploit may not be immediately critical, it still poses a noteworthy risk. User interaction is not needed for exploitation.

Key Insights

• Information Disclosure: The primary risk associated with this CVE is information disclosure. An attacker with system-level privileges could potentially read sensitive data stored within the TEE memory.
• Privilege Requirement: Exploitation requires System execution privileges, limiting the attacker profile to those who have already compromised the system to some degree.
• Low SVRS Score Despite Impact: While the potential impact (information disclosure) can be significant, the SVRS score of 30 indicates a lower likelihood of active exploitation or widespread impact, perhaps due to the system privilege requirement.
• No Active Exploits Reported: There is no information suggesting active exploitation of this CVE.
• No CISA Warnings Reported: There are no CISA warnings reported for this vulnerability.
• No Active Exploitation in the Wild Reported: The vulnerability isn't actively exploited by hackers.
• No Specific Threat Actors Identified: There are no threat actors actively exploiting the vulnerability.

Mitigation Strategies

• Code Review: Conduct a thorough code review of the ppcfw_deny_sec_dram_access function in ppcfw.c to identify and correct the logic error causing the vulnerability.
• Principle of Least Privilege: Enforce the principle of least privilege. Limit access to system execution privileges to only those processes and users that absolutely require it. This reduces the attack surface and limits the impact if a system is compromised.
• TEE Memory Protection: Implement robust memory protection mechanisms within the TEE to prevent unauthorized access, even by processes with system privileges. Address segmentation and permission controls can help.
• Monitoring and Logging: Enhance monitoring and logging to detect any anomalous activity indicative of exploitation attempts targeting TEE memory. Pay close attention to any unexpected memory access patterns from processes with system privileges.

Additional Information

If users have additional queries regarding this incident, they can use the 'Ask to Analyst' feature, contact SOCRadar directly, or open a support ticket for more information if necessary.