CVE-2023-42726 in SC9863A
Summary
by MITRE • 12/04/2023
In TeleService, there is a possible out of bounds read 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 • 05/29/2025
The vulnerability identified as CVE-2023-42726 resides within the TeleService component of a software system, representing a critical out-of-bounds read flaw that stems from inadequate input validation mechanisms. This issue manifests when the application fails to perform proper bounds checking on data structures, specifically affecting memory access operations that process user-supplied or system-generated inputs. The absence of such validation creates a scenario where the program attempts to read memory locations beyond the allocated buffer boundaries, potentially causing unpredictable behavior and system instability.
The technical exploitation of this vulnerability requires an attacker with system execution privileges, indicating that the flaw does not present a direct path for remote code execution but rather operates within the context of a compromised system or privileged user environment. This characteristic aligns with common attack patterns documented in the attack technique framework where adversaries leverage existing privileges to execute malicious code that exploits memory corruption vulnerabilities. The flaw falls under the category of memory safety issues commonly tracked by CWE-129, which specifically addresses insufficient bounds checking in array access operations.
From an operational impact perspective, this vulnerability creates significant risks for system availability and stability, as the out-of-bounds read can trigger memory corruption that leads to application crashes or system hangs. The local denial of service condition means that legitimate system operations may be disrupted, potentially affecting critical services that depend on TeleService functionality. In enterprise environments where such services operate continuously, this vulnerability could result in service interruptions that impact business operations and require immediate remediation efforts. The requirement for system execution privileges suggests that the attack vector is more limited compared to remotely exploitable vulnerabilities, but still represents a substantial risk within privileged environments.
The mitigation strategies for CVE-2023-42726 should focus on implementing robust input validation and bounds checking mechanisms throughout the TeleService codebase. Developers must ensure that all array and buffer access operations include proper boundary validation before memory access occurs, with particular attention to input data from external sources or user interactions. System administrators should implement privilege separation measures to limit the potential impact of such vulnerabilities, ensuring that services operate with minimal required privileges. Additionally, regular code reviews and static analysis should be conducted to identify similar patterns that may exist elsewhere in the application, as memory safety issues often appear in multiple locations within complex software systems. The remediation process should also include comprehensive testing of input validation mechanisms to ensure that the implemented fixes do not introduce regressions in system functionality while effectively addressing the underlying bounds checking deficiency.