Vulnerability in Kernel: isdn: cpai: check ctr->cnr to avoid array index out of bound
Summary
GSD-2021-1001983: isdn: cpai: check ctr->cnr to avoid array index out of bound. Affects Kernel versions < 7d91adc0ccb060ce564103315189466eb822cc6a. 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 functionality and acts as an interface between the hardware and software layers. It manages system resources, facilitates communication between processes, and handles device drivers. The isdn subsystem within the Kernel is responsible for handling Integrated Services Digital Network (ISDN) connections. This vulnerability specifically affects the cpai module within the isdn subsystem.
Vulnerability Detail
The vulnerability in the cpai module of the isdn subsystem arises from a lack of proper bounds checking. Specifically, the code fails to validate the 'ctr->cnr' variable, which can lead to an array index out of bounds error. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial of service. 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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Conclusion
The vulnerability in the cpai module of the isdn subsystem can be mitigated by updating the Linux Kernel to version v4.19.214 or later. This fix addresses the lack of bounds checking and reduces the risk of potential exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that provides core functionality and acts as an interface between the hardware and software layers.
The isdn subsystem within the Kernel is responsible for handling Integrated Services Digital Network (ISDN) connections.
The cpai module is a component of the isdn subsystem that is affected by this vulnerability.
An array index out of bounds error occurs when a program attempts to access an element outside the bounds of an array. In this case, the 'ctr->cnr' variable is not properly validated, leading to potential out of bounds access.
If exploited, this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service.
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