Integer Overflow Vulnerability in uaccess
Summary
GSD-2022-1001328: uaccess: fix integer overflow on access_ok(). Affects Kernel versions >= da551281947cb2c0ab6e0045529a706af5d79584, < a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8. No fix is published. How to fix ↓
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Background
The uaccess vulnerability affects the Kernel package in the Linux ecosystem. The Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. The uaccess vulnerability specifically relates to an integer overflow in the access_ok() function, which is used to check if a user-space memory range is accessible from kernel space. This vulnerability can potentially be exploited by an attacker to gain unauthorized access to sensitive information or execute arbitrary code.
Vulnerability Detail
The uaccess vulnerability arises from an integer overflow in the access_ok() function. This function is responsible for validating user-space memory access requests made by the kernel. By manipulating the input parameters, an attacker can cause an integer overflow, leading to incorrect validation of memory access permissions. This can result in unauthorized access to sensitive data or the execution of malicious code within the kernel context. The vulnerability was introduced in version v4.20 of the Linux Kernel and has been fixed in version v5.17.1.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround available for this vulnerability. It is crucial to update the Linux Kernel to the fixed version to mitigate the risk of exploitation.
Conclusion
The uaccess vulnerability in the Kernel package of the Linux ecosystem poses a significant risk to system security. It is crucial to update the Linux Kernel to version v5.17.1 or later to mitigate the vulnerability. Failure to apply the fix may result in unauthorized access to sensitive information or the execution of arbitrary code. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The uaccess vulnerability can potentially allow an attacker to gain unauthorized access to sensitive information or execute arbitrary code within the kernel context. This can lead to a complete compromise of the affected system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by the uaccess vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for any known vulnerabilities, including the uaccess vulnerability.
At the time of this report, there is no known public exploit for the uaccess vulnerability. However, it is important to apply the recommended fix to mitigate the risk of potential exploitation.
The uaccess vulnerability requires an attacker to have local access to the affected system. It cannot be exploited remotely over a network connection.
The recommended solution is to update the Linux Kernel to the fixed version. There are no alternative solutions or patches available for this vulnerability.
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