Vulnerability in Kernel: Out-of-Bounds Read in qrtr_endpoint_post
Summary
GSD-2021-1001066: net: qrtr: fix OOB Read in qrtr_endpoint_post. Affects Kernel versions >= 194ccc88297ae78d0803adad83c6dcc369787c9e, < 19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The qrtr module in the Kernel is responsible for handling communication between different subsystems using the Qualcomm Real-Time Transport (QRTR) protocol. This protocol enables efficient data exchange between processes running on different devices. However, a vulnerability has been identified in the qrtr_endpoint_post function, which can lead to an out-of-bounds read.
Vulnerability Detail
The vulnerability in the qrtr_endpoint_post function allows an attacker to read data beyond the bounds of a buffer. By exploiting this flaw, an attacker can potentially access sensitive information or cause a denial-of-service condition. The vulnerability was introduced in version v4.15 of the Linux Kernel and was fixed in version v5.12.13. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel is not immediately feasible, a possible workaround is to disable the qrtr module or restrict access to the affected functionality. However, this workaround may impact the functionality of certain applications or services that rely on the qrtr protocol. It is advisable to consult with the relevant system administrators or security experts before implementing any workarounds.
Conclusion
In conclusion, a vulnerability has been identified in the qrtr_endpoint_post function of the Kernel, which can lead to an out-of-bounds read. It is crucial to update the Linux Kernel to version v5.12.13 or later to mitigate this vulnerability. If immediate updating is not possible, consider implementing workarounds after consulting with system administrators or security experts. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The qrtr module in the Kernel is responsible for handling communication between different subsystems using the Qualcomm Real-Time Transport (QRTR) protocol. This protocol enables efficient data exchange between processes running on different devices.
An out-of-bounds read vulnerability occurs when a program accesses data beyond the bounds of a buffer or array. This can lead to the exposure of sensitive information or cause the program to crash.
The impact of this vulnerability can vary depending on the specific context in which it is exploited. It could potentially allow an attacker to access sensitive information or cause a denial-of-service condition.
You can use tools like Vulert to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software. You can visit the Vulert playground at Vulert Scanner to check if your application is affected.
You can find more information about this vulnerability in the Open Source Vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is GSD-2021-1001066. You can access the database entry at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001066.json.
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