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USN-6167-1: QEMU vulnerabilities

19 June 2023

Several security issues were fixed in QEMU.

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Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

It was discovered that QEMU did not properly manage the guest drivers when
shared buffers are not allocated. A malicious guest driver 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 20.04 LTS, Ubuntu
22.04 LTS and Ubuntu 22.10. (CVE-2022-1050)

It was discovered that QEMU did not properly check the size of the
structure pointed to by the guest physical address pqxl. A malicious guest
attacker could use this issue to cause QEMU to crash, resulting in a denial
of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS,
Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10.
(CVE-2022-4144)

It was discovered that QEMU did not properly manage memory in the ACPI
Error Record Serialization Table (ERST) device. 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-2022-4172)

It was discovered that QEMU did not properly manage memory when DMA memory
writes happen repeatedly in the lsi53c895a device. A malicious guest
attacker could use this issue to cause QEMU to crash, resulting in a denial
of service. (CVE-2023-0330)

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 23.04
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.