CVE-2022-47485 in SC9863A
Summary
by MITRE • 05/09/2023
In modem control device, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service with System execution privileges needed.
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Analysis
by VulDB Data Team • 01/28/2025
The vulnerability identified as CVE-2022-47485 represents a critical out-of-bounds write flaw within modem control device software components that operates at a system level. This issue manifests when the software fails to perform proper bounds checking on data inputs or buffer operations, creating an exploitable condition that allows malicious actors to write data beyond the allocated memory boundaries. The vulnerability specifically affects modem control devices which are essential components in telecommunications infrastructure and network connectivity systems, making it particularly concerning for enterprise and industrial environments where reliable communication is paramount.
The technical implementation of this flaw occurs within the modem control device firmware or driver code where input validation mechanisms are insufficient or completely absent. When legitimate or malicious data is processed by the modem control subsystem, the absence of proper boundary checks allows an attacker to manipulate memory layout and potentially overwrite adjacent memory regions. This condition typically arises from improper handling of user-supplied data, configuration parameters, or network packets that flow through the modem control interface. The vulnerability is classified under CWE-787 which specifically addresses out-of-bounds write conditions, making it a well-documented and dangerous class of memory corruption flaws that can lead to system instability and potential privilege escalation.
From an operational standpoint, the impact of CVE-2022-47485 translates to potential local denial of service scenarios where system execution privileges are required for exploitation. This means that an attacker with local access to the system or a user with sufficient privileges could trigger the vulnerability to cause system crashes, service interruptions, or complete system unavailability. The modem control device serves as a critical interface point for network connectivity, so compromising its stability can result in widespread communication failures across connected systems. The requirement for system execution privileges indicates that this vulnerability does not allow for remote code execution without local access, but it still presents a significant threat to system availability and integrity within trusted environments.
The exploitation of this vulnerability aligns with several tactics described in the ATT&CK framework under the T1499 category for network denial of service attacks, as well as T1059 for command and scripting interpreter usage that may occur during exploitation attempts. Organizations should consider implementing comprehensive memory safety checks and bounds validation throughout their modem control device implementations to prevent such conditions from occurring. The recommended mitigations include immediate firmware updates from vendors, implementation of input validation controls, memory protection mechanisms such as stack canaries, and regular security assessments of network control components. Additionally, system administrators should monitor for unusual modem behavior or connectivity disruptions that may indicate exploitation attempts, while maintaining strict access controls to prevent unauthorized local system access that could lead to exploitation of this vulnerability.