CVE-2022-48473 in BiSheng-WNM
Summary
by MITRE • 06/16/2023
There is a misinterpretation of input vulnerability in Huawei Printer. Successful exploitation of this vulnerability may cause the printer service to be abnormal.
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Analysis
by VulDB Data Team • 07/14/2023
The vulnerability identified as CVE-2022-48473 represents a critical input misinterpretation flaw within Huawei printer firmware systems that fundamentally undermines the device's operational integrity and security posture. This weakness manifests when the printer fails to properly validate or process incoming data streams, leading to potential service disruption and unauthorized access vectors. The vulnerability stems from insufficient input sanitization mechanisms that allow malformed or specially crafted data to be improperly interpreted by the printer's processing engines, ultimately resulting in abnormal service behavior that can range from simple print job failures to complete system instability.
From a technical perspective, this vulnerability operates at the intersection of input validation and protocol interpretation within embedded printer systems, making it particularly dangerous due to the privileged nature of printer operations and their integration within corporate networks. The misinterpretation occurs during the parsing of print job data or network communications, where the printer's firmware fails to properly distinguish between legitimate commands and potentially malicious inputs. This flaw aligns with CWE-20, which specifically addresses improper input validation, and represents a classic example of how embedded systems can suffer from inadequate sanitization routines that leave them vulnerable to exploitation through carefully crafted payloads.
The operational impact of CVE-2022-48473 extends beyond simple service disruption to encompass potential security breaches and network compromise scenarios. When exploited, this vulnerability can enable attackers to manipulate printer operations, potentially leading to unauthorized printing of sensitive documents, data exfiltration through printer memory, or even use of the compromised device as a pivot point for lateral movement within network environments. The printer's position as a network-accessible device with potential administrative capabilities makes it an attractive target for attackers seeking to establish persistent access or conduct reconnaissance activities. This vulnerability directly maps to ATT&CK technique T1071.004 for application layer protocol manipulation and T1068 for exploit for privilege escalation.
Mitigation strategies for this vulnerability require immediate firmware updates from Huawei to address the input validation gaps and implement robust sanitization routines that properly handle all incoming data streams. Network segmentation should be implemented to limit access to printer services, while monitoring systems should be deployed to detect anomalous print job patterns or unauthorized access attempts. Organizations should also consider implementing printer access controls, disabling unnecessary services, and establishing regular vulnerability assessments to identify similar weaknesses in their printer fleet. The remediation process must include thorough testing of firmware updates to ensure that the fix does not introduce compatibility issues with existing print workflows while maintaining the printer's essential functionality and security posture.