CVE-2022-48458 in SC7731E
Summary
by MITRE • 11/01/2023
In TeleService, there is a possible system crash due to improper input validation. This could lead to local denial of service with no additional execution privileges needed
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Analysis
by VulDB Data Team • 11/29/2023
The vulnerability identified as CVE-2022-48458 affects the TeleService component and represents a critical weakness in input validation mechanisms that can result in system instability. This flaw exists within the service's handling of user-provided data or external inputs, where insufficient validation allows malformed or unexpected data to propagate through the system without proper sanitization or verification. The vulnerability manifests as a potential system crash scenario, indicating that the service lacks robust error handling and input sanitization protocols that would normally prevent malformed data from causing operational failures. The absence of additional privilege requirements for exploitation makes this vulnerability particularly concerning as it can be leveraged by any local user without elevated access rights, effectively democratizing the attack surface and increasing the likelihood of successful exploitation.
The technical nature of this vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness in software design that allows malicious or unexpected data to cause unintended behavior in applications. This specific implementation flaw likely occurs when the TeleService processes external data streams, configuration inputs, or user-submitted parameters without adequate validation checks. The system crash occurs because the service does not properly handle edge cases or malformed inputs that exceed expected parameter boundaries, leading to memory corruption, stack overflow conditions, or other runtime errors that terminate the service or cause system instability. The lack of proper exception handling and defensive programming practices means that when invalid data reaches critical processing points, the service cannot gracefully recover or reject the input, instead allowing the malformed data to trigger a cascade of failures that ultimately result in denial of service conditions.
From an operational perspective, this vulnerability creates a significant risk for systems relying on TeleService functionality as it can be exploited to disrupt service availability without requiring any special privileges or access rights. The local denial of service condition means that an attacker can potentially cause system-wide disruptions by simply providing malformed input to the service, which can impact not only the TeleService itself but also dependent systems that rely on its functionality. The vulnerability's accessibility and the fact that it requires no additional execution privileges make it particularly dangerous in environments where local user access is common or where privilege escalation is difficult to achieve. This type of vulnerability can be leveraged in both accidental and intentional scenarios, with potential impacts ranging from temporary service disruption to complete system instability that may require manual intervention to restore normal operations.
Effective mitigation strategies for CVE-2022-48458 should focus on implementing comprehensive input validation mechanisms that enforce strict data type checking, length limitations, and format validation before any data is processed by the TeleService. The service should be updated to include proper error handling routines that can gracefully manage unexpected inputs without causing system crashes, and defensive programming practices should be implemented to prevent malformed data from reaching critical processing paths. Security patches should be applied immediately to address the root cause of the input validation failure, and system administrators should implement monitoring solutions to detect unusual patterns of input that may indicate attempted exploitation. Additionally, access controls should be reviewed to ensure that unnecessary local access to the service is minimized, and regular security assessments should be conducted to identify similar validation weaknesses in other components of the system. The remediation efforts should also consider implementing application-level firewalls or input filtering mechanisms that can act as additional barriers against malformed data inputs before they reach the vulnerable service components.