CVE-2024-27210 in Android
Summary
by MITRE • 03/11/2024
In policy_check of fvp.c, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 03/11/2024
The vulnerability identified as CVE-2024-27210 resides within the policy_check function of the fvp.c file, representing a critical out-of-bounds write flaw that fundamentally compromises system security. This issue manifests as a missing bounds check during memory operations, creating a scenario where malicious code can overwrite adjacent memory locations without proper validation. The flaw exists in the kernel-level policy checking mechanism, making it particularly dangerous as it operates at a foundational level of system security controls. The absence of proper input validation allows attackers to manipulate memory boundaries and potentially execute arbitrary code with elevated privileges. This vulnerability is classified under CWE-129 as an Improper Validation of Array Index, which directly relates to the lack of bounds checking in array or buffer operations. The exploitability of this flaw is significantly enhanced by its local nature, as it requires no additional execution privileges beyond what is already available to the user, making it particularly insidious for privilege escalation attacks.
The technical implementation of this vulnerability demonstrates a classic buffer overflow pattern where the policy_check function fails to verify that input parameters remain within acceptable memory boundaries before performing write operations. When the function processes policy validation requests, it likely iterates through arrays or buffers without proper boundary verification, allowing memory corruption that can be leveraged for privilege escalation. The absence of user interaction requirements makes this vulnerability particularly concerning as it can be exploited automatically without any need for social engineering or additional attack vectors. This flaw operates at the kernel level where it can directly manipulate system security policies and access controls, potentially allowing attackers to bypass security mechanisms that should prevent unauthorized privilege elevation. The vulnerability's impact extends beyond simple memory corruption as it directly undermines the integrity of the system's access control framework, enabling local users to gain elevated privileges without requiring additional attack surfaces or execution privileges.
The operational impact of CVE-2024-27210 represents a severe threat to system integrity and security posture, particularly in environments where local user access is possible. Attackers exploiting this vulnerability can achieve local privilege escalation without requiring additional attack vectors or execution privileges, effectively bypassing traditional security controls that rely on proper bounds checking. This flaw creates a persistent threat vector that can be leveraged for ongoing system compromise, as the vulnerability remains exploitable as long as the affected system is running the vulnerable code. The implications extend to compliance requirements and security certifications where such vulnerabilities would likely result in failed security assessments and potential regulatory violations. Organizations implementing security frameworks such as those defined in the NIST Cybersecurity Framework would find this vulnerability particularly problematic as it directly impacts the integrity and availability of system resources. The vulnerability's classification under ATT&CK technique T1068 (Exploitation for Privilege Escalation) indicates that it aligns with established threat modeling patterns for local privilege escalation attacks, making it a recognized and documented threat vector.
Mitigation strategies for CVE-2024-27210 must address both immediate remediation and long-term security hardening measures. The most effective immediate solution involves applying the vendor-provided patch or update that implements proper bounds checking in the policy_check function of fvp.c, ensuring that all array and buffer operations include appropriate validation before write operations occur. System administrators should implement monitoring and detection mechanisms to identify potential exploitation attempts, particularly focusing on unusual memory access patterns or privilege escalation activities that might indicate exploitation of this vulnerability. Security teams should conduct comprehensive vulnerability assessments to identify other potential similar flaws in the codebase that might exhibit the same pattern of missing bounds checking. The implementation of additional security controls such as kernel address space layout randomization and stack canaries can provide additional layers of protection against exploitation attempts. Organizations should also consider implementing principle of least privilege controls and regular security audits to ensure that the vulnerability does not persist in modified or custom implementations of the affected code. Network segmentation and access controls should be reviewed to limit potential lateral movement if exploitation occurs, while incident response procedures should be updated to include detection and response protocols for this specific vulnerability type.