Vulnerability in qemu - security update
Summary
DSA-3087-1: qemu - security update. Affects qemu versions < 1.1.2+dfsg-6a+deb7u6. Fixed in 1.1.2+dfsg-6a+deb7u6. How to fix ↓
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Background
QEMU is a fast processor emulator that allows users to run virtual machines on various host operating systems. It provides full system emulation for a wide range of architectures and devices. The Cirrus VGA emulator is a component of QEMU that emulates the Cirrus Logic graphics card. This vulnerability affects the Debian 7 (wheezy) version of QEMU.
Vulnerability Detail
The vulnerability, identified as CVE-2014-8106, was discovered by Paolo Bonzini of Red Hat. It stems from insufficient blit region checks in the Cirrus VGA emulator. A privileged guest user could exploit this flaw to write into QEMU's address space on the host system. This could potentially lead to privilege escalation, granting the guest user the same privileges as the QEMU host process.
How To Fix
Minimum fixed version
1.1.2+dfsg-6a+deb7u6
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 →
Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
In conclusion, this vulnerability in QEMU's Cirrus VGA emulator could allow a privileged guest user to write into QEMU's address space on the host system, potentially escalating their privileges. It is crucial to upgrade the QEMU packages to version 1.1.2+dfsg-6a+deb7u6 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for qemu →
FAQ
QEMU is a fast processor emulator that allows users to run virtual machines on various host operating systems. It provides full system emulation for a wide range of architectures and devices.
The Cirrus VGA emulator is a component of QEMU that emulates the Cirrus Logic graphics card.
Privilege escalation refers to the act of gaining higher levels of access or privileges than originally intended or authorized. In the context of this vulnerability, it means that a guest user could potentially gain the same privileges as the QEMU host process.
CVE-2014-8106 is the Common Vulnerabilities and Exposures identifier assigned to this specific vulnerability. It is a unique identifier used to track and reference vulnerabilities in software.
To upgrade your QEMU packages, you can follow the package update process specific to the Debian 7 (wheezy) distribution. This typically involves using the package manager to fetch and install the latest version of the QEMU packages.
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