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USN-4511-1: QEMU vulnerability

17 September 2020

QEMU could be made to crash or run programs.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

Ziming Zhang, Xiao Wei, Gonglei Arei, and Yanyu Zhang discovered that QEMU
incorrectly handled certain USB packets. An attacker inside the guest could
use this issue to cause QEMU to crash, resulting in a denial of service, or
possibly execute arbitrary code on the host. In the default installation,
when QEMU is used with libvirt, attackers would be isolated by the libvirt
AppArmor profile.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References

Related notices

  • USN-4467-2: qemu-user, qemu-keymaps, qemu-kvm, qemu, qemu-common, qemu-system-mips, qemu-system, qemu-system-x86, qemu-system-aarch64, qemu-system-ppc, qemu-system-arm, qemu-system-sparc, qemu-user-static, qemu-system-common, qemu-system-misc, qemu-guest-agent, qemu-utils