CVE-2023-52629: linux-libc-dev - Reorder cleanup operations to avoid use-after-free bug
Summary
CVE-2023-52629: In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_r... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
linux-libc-dev is a package that provides the Linux kernel headers for use in userspace. It allows developers to compile and build applications that interact with the Linux kernel. The linux-libc-dev package is vulnerable to a use-after-free bug that can occur when the flush_work() function is called before timer_shutdown_sync() in the switch_drv_remove() function. This vulnerability can lead to a variety of issues, including crashes, privilege escalation, and potentially remote code execution.
Vulnerability Detail
The vulnerability in linux-libc-dev arises from the incorrect order of cleanup operations in the switch_drv_remove() function. The original code places flush_work() before timer_shutdown_sync(), which can result in the worker being rescheduled in switch_timer() after being stopped by flush_work(). This can lead to a use-after-free bug, where the worker and timer are accessed after they have been deallocated. An attacker could potentially exploit this vulnerability to execute arbitrary code or crash the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to apply the patch provided by the Linux kernel developers.
Conclusion
The linux-libc-dev package is vulnerable to a use-after-free bug due to the incorrect order of cleanup operations. This vulnerability can have serious consequences, including crashes, privilege escalation, and potential remote code execution. Users of linux-libc-dev should update to the patched version as soon as possible to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
linux-libc-dev is a package that provides the Linux kernel headers for use in userspace. It allows developers to compile and build applications that interact with the Linux kernel.
A use-after-free bug occurs when a program continues to use a memory address after it has been deallocated. This can lead to crashes, privilege escalation, and potentially remote code execution.
An attacker could exploit this vulnerability by triggering the use-after-free bug, potentially leading to the execution of arbitrary code or crashing the system.
There is no known workaround for this vulnerability. It is recommended to apply the patch provided by the Linux kernel developers.
To update linux-libc-dev to the patched version, users should follow the instructions provided by their Linux distribution or package manager. It is important to regularly update software to ensure the latest security patches are applied.
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