Denial of Service Vulnerability in Xen Package: CVE-2017-15592
Summary
ALPINE-CVE-2017-15592: An issue was discovered in Xen through 4.9.x allowing x86 HVM guest OS users to cause a denial of service (hypervisor crash) or possibly gain privileges because self-linear shadow mappings are mishandled for translated g... Affects xen versions < 4.9.0-r6. Fixed in 4.9.0-r6. How to fix ↓
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Background
Xen is a popular open-source hypervisor that enables the creation and management of virtual machines. It allows multiple operating systems to run concurrently on a single physical machine, providing isolation and resource management. The Xen package is widely used in cloud computing and virtualization environments. However, it has been identified to have a vulnerability that can lead to severe consequences for users of x86 HVM guest operating systems.
Vulnerability Detail
An issue was discovered in Xen through version 4.9.x that allows x86 HVM guest OS users to cause a denial of service (hypervisor crash) or potentially gain elevated privileges. This vulnerability arises from mishandling self-linear shadow mappings for translated guests, which can lead to instability in the hypervisor and compromise the security of the virtualized environment.
How To Fix
Minimum fixed version
4.9.0-r6
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, it is advisable to limit access to the hypervisor and ensure that only trusted users can operate within the x86 HVM guest OS environments. Additionally, monitoring the hypervisor for unusual activity can help mitigate the risks associated with this vulnerability.
Conclusion
The CVE-2017-15592 vulnerability in the Xen package poses significant risks to users of x86 HVM guest operating systems. It is crucial to update to the patched version to mitigate these risks and ensure the stability and security of your virtualized environments.
See every vulnerability recorded for xen →
FAQ
CVE-2017-15592 is a vulnerability in the Xen hypervisor that allows x86 HVM guest OS users to cause a denial of service or potentially gain privileges due to mishandled self-linear shadow mappings.
The vulnerability can lead to hypervisor crashes, resulting in service downtime and potential unauthorized access to system resources.
You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities. Visit Vulert Scanner to check if your application is affected without requiring any signup.
The CVSS score for this vulnerability is 8.8, indicating a high severity level.
Yes, updating the Xen package to version 4.9.0-r6 or later will permanently fix the vulnerability.
References
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