Sensitive Keystroke Information Exposure in Linux Kernel - CVE-2011-4916
Summary
DEBIAN-CVE-2011-4916: Linux kernel through 3.1 allows local users to obtain sensitive keystroke information via access to /dev/pts/ and /dev/tty*. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to software applications. It is widely used across various platforms, including servers, desktops, and embedded systems. This vulnerability affects multiple versions of the Linux kernel, allowing local users to access sensitive keystroke information through specific device files.
Vulnerability Detail
CVE-2011-4916 is a vulnerability in the Linux kernel that allows local users to obtain sensitive keystroke information by accessing the device files /dev/pts/ and /dev/tty*. This exposure can lead to unauthorized access to confidential data, potentially compromising user privacy and security. The vulnerability originates from inadequate access controls on these device files, which should restrict access to authorized users only.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, you can restrict access to the /dev/pts/ and /dev/tty* device files by modifying their permissions. This can be done using the following command: 'chmod 600 /dev/pts/* /dev/tty*'. However, this may affect the functionality of applications that require access to these files.
Conclusion
CVE-2011-4916 is a significant vulnerability in the Linux kernel that exposes sensitive keystroke information to local users. It is crucial to update the Linux package to a patched version to mitigate the risks associated with this vulnerability. Temporary workarounds can be implemented, but the best course of action is to ensure your system is running a secure version of the kernel.
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FAQ
CVE-2011-4916 is a vulnerability in the Linux kernel that allows local users to access sensitive keystroke information through specific device files.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
The vulnerability can lead to unauthorized access to sensitive information, compromising user privacy and security.
You can update your Linux kernel by running 'sudo apt-get update && sudo apt-get upgrade linux' in your terminal.
Yes, updating to a patched version of the Linux kernel is the recommended permanent fix for this vulnerability.
References
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