Vulnerability in Kernel: vt_ioctl: fix array_index_nospec in vt_setactivate
Summary
GSD-2022-1000524: vt_ioctl: fix array_index_nospec in vt_setactivate. Affects Kernel versions < 6550bdf52846f85a2a3726a5aa0c7c4399f2fc02. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities and services to enable the proper functioning of the system. One of the components within the Kernel is vt_ioctl, which handles input/output control operations for virtual terminals. Virtual terminals allow users to interact with the system through a command-line interface. However, a vulnerability has been identified in the vt_ioctl component, specifically in the vt_setactivate function.
Vulnerability Detail
The vt_setactivate function in the Kernel's vt_ioctl component is susceptible to an array_index_nospec vulnerability. This vulnerability could potentially be exploited by an attacker to bypass array bounds checks and access sensitive information or execute arbitrary code. The vulnerability arises from improper handling of user-supplied input, allowing an out-of-bounds memory access. Successful exploitation of this vulnerability could lead to privilege escalation, information disclosure, or system compromise. It is important to note that the impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
In conclusion, a vulnerability has been identified in the Kernel's vt_ioctl component, which could potentially allow an attacker to bypass array bounds checks and execute arbitrary code or access sensitive information. It is crucial to update the Kernel to version v5.16.10 or later, which includes the necessary fix. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
If successfully exploited, this vulnerability could lead to privilege escalation, information disclosure, or system compromise.
You can use Vulert's playground (https://vulert.com/scanner) 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.
No specific workaround has been provided for this vulnerability. It is recommended to update the Kernel to the fixed version.
There are no known instances of this vulnerability being exploited at the time of this report. However, it is crucial to apply the fix to mitigate any potential risks.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1000xxx/GSD-2022-1000524.json
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