Critical Denial of Service Vulnerability in QEMU Package
Summary
ALPINE-CVE-2017-5667: The sdhci_sdma_transfer_multi_blocks function in hw/sd/sdhci.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (out-of-bounds heap access and crash) or execute arbitrary c... Affects qemu versions < 2.8.1-r1. Fixed in 2.8.1-r1. How to fix ↓
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Background
QEMU is an open-source machine emulator and virtualizer that allows users to run multiple operating systems on a single host. It is widely used for virtualization and emulation purposes, providing users with the ability to create and manage virtual machines. The package is known for its flexibility and support for various architectures. However, it has been identified to have a critical vulnerability that can lead to severe security risks.
Vulnerability Detail
The vulnerability, identified as CVE-2017-5667, resides in the sdhci_sdma_transfer_multi_blocks function within the hw/sd/sdhci.c file of QEMU. This flaw allows local guest OS privileged users to exploit the system, leading to a denial of service through out-of-bounds heap access. In severe cases, it could enable attackers to execute arbitrary code on the QEMU host, posing significant risks to system integrity and security. The vulnerability has a CVSS score of 6.5, indicating a moderate severity level that requires prompt attention.
How To Fix
Minimum fixed version
2.8.1-r1
This is the first release that contains the fix.
sudo apk add --upgrade qemuTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the QEMU virtualization environment to trusted users only, thereby reducing the risk of exploitation until the package can be updated.
Conclusion
In summary, the CVE-2017-5667 vulnerability in the QEMU package poses significant risks, including denial of service and potential arbitrary code execution. It is crucial for users to update their packages to the patched versions to ensure system security. Temporary workarounds can be implemented while awaiting updates.
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FAQ
CVE-2017-5667 is a vulnerability in the QEMU package that allows local guest OS privileged users to cause a denial of service or execute arbitrary code on the host.
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 CVSS score of CVE-2017-5667 is 6.5, indicating a moderate severity level.
If immediate updates are not possible, restrict access to the QEMU environment to trusted users as a temporary measure.
For more information on vulnerabilities, you can visit Vulert, which monitors and alerts for open-source vulnerabilities in software using just a manifest file.
References
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