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USN-5772-1: QEMU vulnerabilities

12 December 2022

Several security issues were fixed in QEMU.

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Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

It was discovered that QEMU incorrectly handled bulk transfers from SPICE
clients. A remote attacker 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 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2021-3682)

It was discovered that QEMU did not properly manage memory when it
transfers the USB packets. A malicious guest attacker 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 18.04 LTS, Ubuntu
20.04 LTS and Ubuntu 22.04 LTS. (CVE-2021-3750)

It was discovered that the QEMU SCSI device emulation incorrectly handled
certain MODE SELECT commands. An attacker inside the guest could possibly
use this issue to cause QEMU to crash, resulting in a denial of service.
This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
(CVE-2021-3930)

It was discovered that QEMU did not properly manage memory when it
processing repeated messages to cancel the current SCSI request. A
malicious privileged guest attacker could use this issue to cause QEMU to
crash, resulting in a denial of service. (CVE-2022-0216)

It was discovered that QEMU did not properly manage memory when it
using Tulip device emulation. A malicious guest attacker could use this
issue to cause QEMU to crash, resulting in a denial of service. This issue
only affected Ubuntu 22.10. (CVE-2022-2962)

It was discovered that QEMU did not properly manage memory when processing
ClientCutText messages. A attacker could use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected Ubuntu
22.04 LTS and Ubuntu 22.10. (CVE-2022-3165)

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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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Update instructions

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

Ubuntu 22.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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

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Further reading