QEMU - Security Update for Debian 7
Summary
DLA-678-1: qemu - security update. Affects qemu versions < 1.1.2+dfsg-6+deb7u17. Fixed in 1.1.2+dfsg-6+deb7u17. How to fix ↓
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Background
QEMU is a fast and portable open-source machine emulator and virtualizer. It provides support for various hardware devices and can be used to run operating systems and applications in a virtualized environment. QEMU is vulnerable to multiple security issues, including an infinite loop, memory leakage, null pointer dereference, and divide by zero vulnerabilities.
Vulnerability Detail
The first vulnerability (CVE-2016-8576) affects QEMU's USB xHCI controller emulation support, leading to an infinite loop issue while processing USB command rings. The second vulnerability (CVE-2016-8577) affects the virtio-9p back-end support, causing memory leakage during I/O read operations. The third vulnerability (CVE-2016-8578) also affects the virtio-9p back-end support, resulting in a null pointer dereference issue during I/O vector unmarshalling operations. The fourth vulnerability (CVE-2016-8669) affects the 16550A UART emulation support, leading to a divide by zero issue while updating serial device parameters.
How To Fix
Minimum fixed version
1.1.2+dfsg-6+deb7u17
This is the first release that contains the fix.
sudo apt-get install --only-upgrade qemuTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
QEMU is susceptible to multiple vulnerabilities that could lead to denial of service, resource exhaustion, or other security issues. It is crucial to upgrade to the fixed version of QEMU (1.1.2+dfsg-6+deb7u17 or later) to mitigate these risks. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
QEMU is an open-source machine emulator and virtualizer that allows running operating systems and applications in a virtualized environment.
CVE-2016-8576 can lead to an infinite loop issue in QEMU's USB xHCI controller emulation, potentially causing denial of service or resource exhaustion.
You can use the Vulert Playground at Vulert Scanner to check if your QEMU version is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will alert you in real-time.
No specific workarounds have been mentioned for these vulnerabilities. It is recommended to upgrade to the fixed version of QEMU.
You can find more information about Debian LTS security advisories, including how to apply updates and frequently asked questions, at https://wiki.debian.org/LTS.
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