CVE-2023-42723 in SC7731E
Summary
by MITRE • 12/04/2023
In camera service, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with no additional execution privileges needed
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Analysis
by VulDB Data Team • 12/22/2023
The vulnerability identified as CVE-2023-42723 resides within the camera service component of a software system, representing a critical out-of-bounds read condition that stems from insufficient input validation. This flaw manifests when the system fails to properly verify array or buffer boundaries before accessing memory locations, creating a scenario where arbitrary data access can occur beyond the intended memory limits. The missing bounds check represents a fundamental security oversight that allows malicious actors to potentially manipulate memory access patterns through crafted inputs or by exploiting existing service interactions. The vulnerability specifically impacts the camera service functionality, which typically handles image capture, processing, and related multimedia operations within embedded systems or mobile platforms.
The technical nature of this vulnerability aligns with CWE-129, which classifies issues related to insufficient validation of length of input buffers, and more specifically with CWE-125, which addresses out-of-bounds read conditions. From an operational perspective, the flaw enables a local attacker to trigger a denial of service condition without requiring elevated privileges or additional execution capabilities. This means that any user with access to the camera service interface can potentially cause the service to crash or become unresponsive, effectively rendering the camera functionality unavailable to legitimate users. The attack vector typically involves sending malformed data or commands to the camera service that bypass normal input sanitization mechanisms, allowing the system to attempt reading memory locations that fall outside the allocated buffer boundaries.
The operational impact of CVE-2023-42723 extends beyond simple service disruption, as it can compromise the overall stability and reliability of systems that depend on camera functionality. In embedded environments or mobile devices, this vulnerability may cause cascading failures where the camera service crash affects related multimedia processing components, system resource management, or even broader application frameworks that depend on camera services. The lack of privilege requirements makes this vulnerability particularly concerning as it can be exploited by any local user or process with access to the camera service interface, potentially including malicious applications or compromised system components. From a threat actor perspective, this vulnerability fits within ATT&CK technique T1499.004, which covers network disruption through resource exhaustion or service interruption, and represents a low-effort, high-impact attack vector that can be automated and scaled.
Mitigation strategies for CVE-2023-42723 should focus on implementing comprehensive bounds checking mechanisms within the camera service codebase, including input validation routines that verify buffer sizes and memory access patterns before execution. System administrators should ensure that camera service components are regularly updated with patches that address the missing bounds check conditions, while also implementing monitoring solutions to detect anomalous access patterns or service disruptions that may indicate exploitation attempts. Additional defensive measures include deploying runtime protections such as address space layout randomization and stack canaries to make exploitation more difficult, while also establishing proper access controls that limit which processes can interact with the camera service interface. The vulnerability demonstrates the critical importance of input validation and memory safety practices in system design, particularly for services that handle multimedia data processing where buffer overflows and out-of-bounds reads can have significant operational consequences.