CVE-2023-20644 in MT6580
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: ALPS07628603; Issue ID: ALPS07628603.
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Analysis
by VulDB Data Team • 08/28/2025
The vulnerability identified as CVE-2023-20644 resides within the ril component of a system, representing a critical out-of-bounds read condition that stems from insufficient input validation. This flaw manifests when the ril module processes data without proper bounds checking, creating an opportunity for unauthorized data access. The vulnerability specifically impacts systems where the ril service operates with system-level execution privileges, making it particularly concerning for environments where privileged access is required for exploitation. The absence of bounds validation in the data processing pipeline allows for memory access beyond allocated boundaries, potentially exposing sensitive information stored in adjacent memory locations.
The technical implementation of this vulnerability demonstrates a classic buffer over-read scenario where the ril component fails to verify array indices or data length constraints before accessing memory regions. This condition falls under the CWE-129 weakness category, which specifically addresses issues related to insufficient bounds checking in input validation. The flaw operates at the system execution level, requiring only the privileges associated with the ril service to be exploited successfully. The vulnerability does not require user interaction for exploitation, which significantly increases its attack surface and potential impact. Attackers can leverage this condition to extract information from memory locations that should remain protected, potentially revealing system configurations, authentication data, or other sensitive operational details.
From an operational perspective, this vulnerability creates a significant risk for systems relying on the ril service for critical communications or data processing functions. The local information disclosure threat means that an attacker with system execution privileges could access confidential data that would normally be protected from unauthorized access. The impact extends beyond simple data exposure, as the leaked information could potentially be used to facilitate further attacks or compromise additional system components. The vulnerability's designation as requiring system execution privileges indicates that it operates at a level where the attacker already possesses the necessary permissions to execute code, making the information disclosure aspect particularly damaging.
The mitigation strategy for CVE-2023-20644 involves implementing proper bounds checking mechanisms within the ril component to validate all array indices and data length parameters before memory access operations. System administrators should prioritize applying the patch referenced by ALPS07628603, which specifically addresses this vulnerability through code modifications that enforce proper input validation. The fix should include comprehensive testing to ensure that all data processing paths within the ril module properly validate input boundaries. Organizations should also consider implementing additional monitoring and logging mechanisms to detect potential exploitation attempts, as the vulnerability operates at the system level where traditional user interaction requirements are absent. Security teams should conduct thorough assessments of systems running the affected ril component to identify any potential exploitation indicators and ensure that all privileged execution environments are properly secured against this specific class of vulnerability.