Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-5489-1: QEMU vulnerabilities

21 June 2022

Several security issues were fixed in QEMU.

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

Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

Alexander Bulekov discovered that QEMU incorrectly handled floppy disk
emulation. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service, or possibly leak
sensitive information. (CVE-2021-3507)

It was discovered that QEMU incorrectly handled NVME controller emulation.
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. This
issue only affected Ubuntu 22.04 LTS. (CVE-2021-3929)

It was discovered that QEMU incorrectly handled QXL display device
emulation. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2021-4206, CVE-2021-4207)

Jietao Xiao, Jinku Li, Wenbo Shen, and Nanzi Yang discovered that QEMU
incorrectly handled the virtiofsd shared file system daemon. An attacker
inside the guest could use this issue to create files with incorrect
ownership, possibly leading to privilege escalation. This issue only
affected Ubuntu 22.04 LTS. (CVE-2022-0358)

It was discovered that QEMU incorrectly handled virtio-net devices. A
privileged attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2022-26353)

It was discovered that QEMU incorrectly handled vhost-vsock devices. A
privileged attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2022-26354)

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 22.04
Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04

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

References

Related notices

  • USN-5307-1: qemu-user-static, qemu-system-arm, qemu-system-x86-microvm, qemu-user-binfmt, qemu-system-x86, qemu-system-s390x, qemu-guest-agent, qemu-block-extra, qemu-system-mips, qemu-user, qemu-system-data, qemu-system-sparc, qemu-system, qemu-system-ppc, qemu-system-misc, qemu-kvm, qemu-system-common, qemu-system-gui, qemu-system-x86-xen, qemu, qemu-utils

Join the discussion

Need help with your security needs?

Ubuntu Pro provides up to ten-year security coverage for over 23,000 open-source packages within the Ubuntu Main and Universe repositories.

Talk to an expert to find out what would work best for you

Further reading