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)

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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 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.

References

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Further reading