QID 198683

Date Published: 2022-03-01

QID 198683: Ubuntu Security Notification for QEMU Vulnerabilities (USN-5307-1)

Qemu incorrectly handled the floppy diskemulator.
The qemu vmxnet3 nic emulator incorrectlyhandled certain values.
The qemu vhost-user gpu device contained severalsecurity issues.
Qemu incorrectly handled bulk transfers from spiceclients.
The qemu uas device emulation incorrectly handledcertain stream numbers.
The qemu virtio-net device incorrectly handledcertain buffer addresses.
The qemu scsi device emulation incorrectly handledcertain mode select commands.
The qemu acpi logic incorrectly handled certainvalues.
The qemuvirtiofsd device incorrectly handled permissions when creating files.

An attacker inside the guest could use this issue to cause qemuto crash, resulting in a denial of service.
An attacker inside the guest could use this issueto cause qemu to crash, resulting in a denial of service.
An attacker inside the guest could use these issues tocause qemu to crash, resulting in a denial of service, leak sensitiveinformation, or possibly execute arbitrary code.
A remote attacker could use this issue to cause qemu to crash,resulting in a denial of service, or possibly execute arbitrary code.
An attacker inside the guest could use this issueto cause qemu to crash, resulting in a denial of service, or possiblyexecute arbitrary code.
An attacker inside the guest could use this issueto cause qemu to crash, resulting in a denial of service, or possiblyexecute arbitrary code.
An attacker inside the guest could possiblyuse this issue to cause qemu to crash, resulting in a denial of service.
An attacker inside the guest could possibly use this issue to causeqemu to crash, resulting in a denial of service.
Anattacker inside the guest could use this issue to create files inside thedirectory shared by virtiofs with unintended permissions, possibly allowingprivilege escalation.

  • CVSS V3 rated as Critical - 8.5 severity.
  • CVSS V2 rated as High - 6 severity.
  • Solution
    Refer to Ubuntu security advisory USN-5307-1 for updates and patch information.
    Vendor References
    Software Advisories
    Advisory ID Software Component Link
    USN-5307-1 Ubuntu Linux URL Logo ubuntu.com/security/notices/USN-5307-1