Denial of Service Vulnerability in Xen Package: CVE-2018-12207
Summary
ALPINE-CVE-2018-12207: Improper invalidation for page table updates by a virtual guest operating system for multiple Intel(R) Processors may allow an authenticated user to potentially enable denial of service of the host system via local acces... Affects xen versions < 4.12.1-r1. Fixed in 4.12.1-r1. How to fix ↓
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Background
The Xen package is a popular open-source hypervisor that allows multiple operating systems to run on a single physical machine. It is widely used for virtualization in cloud computing and server environments. The package provides features such as isolation, resource management, and performance optimization. However, it has been identified to have a vulnerability that could potentially allow an authenticated user to cause a denial of service to the host system.
Vulnerability Detail
CVE-2018-12207 is a vulnerability that arises from improper invalidation of page table updates by a virtual guest operating system on multiple Intel processors. This flaw can be exploited by an authenticated user with local access to the system, leading to a potential denial of service condition for the host system. The vulnerability has a CVSS score of 6.5, indicating a moderate severity level. It is crucial for users of affected versions to understand the implications of this vulnerability and take necessary actions to mitigate risks.
How To Fix
Minimum fixed version
4.12.1-r1
This is the first release that contains the fix.
sudo apk add --upgrade xenTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a workaround, users can limit access to the hypervisor to trusted users only, thereby reducing the risk of exploitation. Additionally, monitoring system logs for unusual activities may help in early detection of potential attacks.
Conclusion
CVE-2018-12207 is a significant vulnerability in the Xen package that can lead to denial of service on the host system. Users are strongly advised to update to the latest patched versions to mitigate risks. Implementing workarounds and monitoring can also help in managing the vulnerability until a full update can be applied.
See every vulnerability recorded for xen →
FAQ
CVE-2018-12207 is a vulnerability in the Xen package that allows an authenticated user to potentially cause a denial of service on the host system.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The CVSS score for CVE-2018-12207 is 6.5, indicating a moderate severity level.
Affected versions include Xen prior to 4.12.1-r1 for Alpine v3.10 and prior to 4.13.0-r0 for Alpine v3.11 and later versions.
If immediate updating is not possible, restrict access to the hypervisor and monitor system logs for any suspicious activities.
References
Related vulnerabilities
Recent vulnerabilities recorded for xen.
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