CVE-2023-20645 in MT6739
Summary
by MITRE • 03/07/2023
In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07628609; Issue ID: ALPS07628609.
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Analysis
by VulDB Data Team • 08/29/2025
The vulnerability identified as CVE-2023-20645 resides within the ril component of a system, representing a critical out-of-bounds read condition that stems from inadequate input validation. This flaw manifests when the system processes data without proper bounds checking mechanisms, creating an opportunity for unauthorized data access. The vulnerability is particularly concerning because it can be exploited to achieve local information disclosure, requiring only system execution privileges for successful exploitation. The absence of user interaction requirements makes this vulnerability especially dangerous as it can be triggered automatically without any human intervention, potentially allowing attackers to harvest sensitive information from system memory.
The technical implementation of this vulnerability aligns with CWE-129, which specifically addresses insufficient bounds checking in software implementations. This weakness creates a scenario where memory access operations extend beyond allocated buffer boundaries, potentially exposing confidential data stored in adjacent memory locations. The ril component's failure to validate input parameters before processing them creates a predictable attack surface where an attacker can manipulate input data to trigger the out-of-bounds read condition. The vulnerability's exploitation path involves crafting specific input sequences that cause the system to access memory locations outside the intended buffer boundaries, thereby disclosing information that should remain protected.
From an operational perspective, this vulnerability poses significant risks to system integrity and data confidentiality. The local information disclosure capability means that an attacker with system execution privileges can extract sensitive data from memory, potentially including authentication credentials, system configuration details, or proprietary information. The impact extends beyond simple data exposure as this information could be leveraged for further attacks, including privilege escalation or lateral movement within the system. The fact that no user interaction is required for exploitation makes this vulnerability particularly dangerous in environments where system-level access might be compromised through other attack vectors, as it allows for automated information harvesting without additional attack complexity.
The mitigation strategy for this vulnerability involves applying the patch identifier ALPS07628609, which addresses the missing bounds check in the ril component. Security administrators should prioritize the deployment of this patch across all affected systems to eliminate the out-of-bounds read condition. Additionally, implementing comprehensive input validation mechanisms and memory safety checks within the ril component would provide additional protection against similar vulnerabilities. Organizations should also consider implementing runtime monitoring and anomaly detection systems to identify potential exploitation attempts, as outlined in the ATT&CK framework's techniques for privilege escalation and credential access. Regular security assessments and code reviews focusing on memory management practices would help prevent similar issues from emerging in the future, ensuring that all components adhere to secure coding standards and maintain proper bounds checking mechanisms throughout their execution lifecycle.