Use After Free Vulnerability in sja1000 Package
Summary
GSD-2021-1002585: can: sja1000: fix use after free in ems_pcmcia_add_card(). Affects Kernel versions >= fd734c6f25aea4b2b44b045e489aec67b388577e, < 474f9a8534f5f89841240a7e978bafd6e1e039ce. No fix is published. How to fix ↓
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Background
The sja1000 package is a component of the Linux Kernel, which is responsible for handling CAN (Controller Area Network) devices. It provides support for various CAN controllers, including the sja1000 controller. The sja1000 driver allows communication with CAN devices connected to the system. However, a vulnerability has been discovered in the sja1000 package that can lead to a use after free condition.
Vulnerability Detail
The use after free vulnerability in the sja1000 package occurs in the ems_pcmcia_add_card() function. This vulnerability allows an attacker to exploit a freed memory region, potentially leading to arbitrary code execution or a system crash. The vulnerability was introduced in version v3.2 of the Linux Kernel and has been fixed in version v5.15.8. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.8 or later. This update includes the commit 474f9a8534f5f89841240a7e978bafd6e1e039ce, which addresses the use after free issue in the sja1000 package.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to the recommended version.
Conclusion
The use after free vulnerability in the sja1000 package can be mitigated by updating the Linux Kernel to version v5.15.8 or later. This update includes the necessary fix to address the vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The sja1000 package is a component of the Linux Kernel that provides support for CAN controllers, allowing communication with CAN devices connected to the system.
A use after free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to various security issues, including arbitrary code execution or system crashes.
The impact of this vulnerability is not yet proven. However, if successfully exploited, it could lead to arbitrary code execution or system crashes.
To fix this vulnerability, update the Linux Kernel to version v5.15.8 or later, which includes the necessary fix for the sja1000 package.
No, there is no known workaround for this vulnerability. It is crucial to apply the fix by updating the Linux Kernel.
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