Denial of Service Vulnerability in Linux Kernel - CVE-2019-12456
Summary
DEBIAN-CVE-2019-12456: An issue was discovered in the MPT3COMMAND case in _ctl_ioctl_main in drivers/scsi/mpt3sas/mpt3sas_ctl.c in the Linux kernel through 5.1.5. 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 applications. It is widely used across various platforms, including servers, desktops, and embedded systems. The kernel's robust architecture and extensive feature set make it a critical component for system stability and performance. However, vulnerabilities can arise, such as CVE-2019-12456, which affects the MPT3COMMAND case in the mpt3sas driver.
Vulnerability Detail
CVE-2019-12456 is a vulnerability found in the MPT3COMMAND case within the _ctl_ioctl_main function of the mpt3sas driver in the Linux kernel, affecting versions up to 5.1.5. This vulnerability allows local users to potentially cause a denial of service or other unspecified impacts by manipulating the value of ioc_number between two kernel reads, leading to a 'double fetch' scenario. Although a third-party report suggests that this vulnerability may be unexploitable due to the way the doubly fetched value is handled, it still poses a risk that should be addressed.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. However, it is advisable to limit local user access and monitor system logs for any unusual activity until the system can be updated.
Conclusion
CVE-2019-12456 is a notable vulnerability in the Linux kernel that can lead to denial of service under certain conditions. It is crucial for users to update their systems to mitigate this risk and ensure the security of their environments. Regular monitoring and timely updates are essential practices for maintaining system integrity.
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FAQ
CVE-2019-12456 is a vulnerability in the Linux kernel that allows local users to potentially cause a denial of service by manipulating kernel read values.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The vulnerability affects the Linux kernel versions up to 5.1.5.
Yes, updating to the latest version of the Linux kernel will include the patch for CVE-2019-12456.
If you cannot update your kernel right away, consider limiting local user access and monitoring system logs for any suspicious activity.
References
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