Race Condition Vulnerability in Linux Kernel
Summary
GSD-2021-1000571: can: isotp: prevent race between isotp_bind() and isotp_setsockopt(). Affects Kernel versions >= 921ca574cd382142add8b12d0a7117f495510de5, < b190618d8337b9466d985854e417dc0e8b012e3c. 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 system resources and providing an interface for applications to interact with the hardware. It is widely used in various devices and servers. The vulnerability identified in the Linux Kernel relates to the isotp module, which is responsible for handling ISO-TP (ISO 15765-2) protocol data over CAN (Controller Area Network).
Vulnerability Detail
The vulnerability in the isotp module of the Linux Kernel allows for a race condition between the isotp_bind() and isotp_setsockopt() functions. This race condition can potentially lead to inconsistent behavior and security issues. An attacker could exploit this vulnerability to manipulate the state of the isotp module, potentially causing denial of service or unauthorized access to sensitive information. The vulnerability was introduced in version v5.11 of the Linux Kernel and has been fixed in version v5.12.9.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable the isotp module if it is not required for their system. This can be done by removing the module or disabling it in the kernel configuration. However, this workaround should only be considered if the isotp functionality is not essential for the system, as it may impact the functionality of certain applications or devices that rely on ISO-TP protocol over CAN.
Conclusion
In conclusion, the race condition vulnerability in the isotp module of the Linux Kernel can lead to inconsistent behavior, denial of service, or unauthorized access. It is crucial to update the Linux Kernel to version v5.12.9 or later to mitigate this vulnerability. Alternatively, if the isotp functionality is not required, disabling the module can serve as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can potentially lead to inconsistent behavior, denial of service, or unauthorized access to sensitive information.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for any open-source vulnerabilities, including this race condition vulnerability in the Linux Kernel.
Yes, the vulnerability has been fixed in version v5.12.9 of the Linux Kernel. It is recommended to update to this version or later to mitigate the risk.
Yes, as a workaround, you can disable the isotp module if it is not required for your system. However, this should only be done if the isotp functionality is not essential, as it may impact certain applications or devices that rely on ISO-TP protocol over CAN.
You can refer to the vulnerability details in the GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000571.json) for more information about this vulnerability, including the specific commit that fixed it.
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