In the Linux kernel, a high-severity vulnerability has been identified involving the HID multitouch functionality. This vulnerability allows for a malicious or clumsy device to respond to a specific report's feature request with a different report ID. The consequence of this mismatch can lead to severe confusion in the HID core, resulting in out-of-bounds (OOB) writes, which can jeopardize system integrity and availability. The CVSS score for this vulnerability is 7.8, indicating a high level of severity that organizations cannot afford to ignore.
Risk to organizations includes the potential for unauthorized access and manipulation of system resources, which can lead to significant operational disruptions. Given the local attack vector and the low privileges required to exploit this vulnerability, it is critical for organizations to prioritize remediation efforts. Immediate action is required to mitigate risks associated with this flaw, especially in environments where the Linux kernel is deployed.
Currently, there is no confirmed public exploit available for this vulnerability, nor is it actively being exploited in the wild. However, the potential impact of an exploit necessitates that organizations remain vigilant and proactive in their security measures.
Organizations should address this vulnerability in their priority patch cycle to ensure that their systems remain secure and functional.
Vulnerability Details
The official description of the vulnerability states that it is related to the HID multitouch feature in the Linux kernel. Specifically, the issue arises when a device responds to a report's feature request with an incorrect report ID, leading to possible OOB writes. This vulnerability has been classified under CVSS version 3.1 with a base score of 7.8, classified as high severity. The attack vector is local, requiring low privileges and no user interaction, which increases the risk of exploitation.
Technical Analysis
The root cause of this vulnerability lies in the lack of checks that validate the report ID in the response against the expected report ID. Without these checks, a device can send misleading responses, causing confusion in the HID core. The attack vector is local, meaning that an attacker needs to have physical access to the device or be on the same local network. The complexity of the attack is low, as it requires only basic privileges to initiate. User interaction is not required, making it easier for attackers to exploit this vulnerability.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, particularly in environments that rely heavily on HID devices. The potential for OOB writes can lead to data corruption, system crashes, and unauthorized access. The urgency for organizations is underscored by the high CVSS score, indicating that this vulnerability should be addressed in their priority patch cycle. The blast radius could affect any device utilizing the Linux kernel for HID functionality, making it essential for organizations to assess their exposure and implement necessary controls.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Currently, there are no specific version ranges disclosed as affected. Organizations should assume all versions prior to the vendor patch are potentially vulnerable.
Mitigation & Remediation
Organizations should prioritize patching the Linux kernel to resolve this vulnerability. It is recommended to upgrade to the latest stable version provided by the vendor. In addition, organizations should implement configuration hardening practices to reduce the attack surface and apply network controls to limit the exposure of devices using the Linux kernel for HID functionalities. For further guidance on effective remediation strategies, organizations may refer to our penetration testing services.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual HID device behavior and validate report IDs in responses. Behavioral anomalies such as unexpected report responses or system crashes should be investigated promptly. Additionally, network signatures that correlate with known HID device interactions can assist in identifying malicious activities.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing challenges organizations face in securing device interactions within their environments. As the landscape of cyber threats evolves, it is essential for security teams to adopt proactive measures and continuously evaluate their defenses. The incident demonstrates the importance of validating device responses and the potential implications of device misconfigurations. For further insights on improving security posture, organizations can explore our API penetration testing strategies and the role of cloud penetration testing in enhancing overall security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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