[USN-5489-1] QEMU vulnerabilities


========================================================================== Ubuntu Security Notice USN-5489-1 June 21, 2022
qemu vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 22.04 LTS – Ubuntu 21.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in QEMU.
Software Description: – 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)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04 LTS: qemu-system 1:6.2+dfsg-2ubuntu6.2 qemu-system-arm 1:6.2+dfsg-2ubuntu6.2 qemu-system-mips 1:6.2+dfsg-2ubuntu6.2 qemu-system-misc 1:6.2+dfsg-2ubuntu6.2 qemu-system-ppc 1:6.2+dfsg-2ubuntu6.2 qemu-system-s390x 1:6.2+dfsg-2ubuntu6.2 qemu-system-sparc 1:6.2+dfsg-2ubuntu6.2 qemu-system-x86 1:6.2+dfsg-2ubuntu6.2 qemu-system-x86-microvm 1:6.2+dfsg-2ubuntu6.2 qemu-system-x86-xen 1:6.2+dfsg-2ubuntu6.2
Ubuntu 21.10: qemu-system 1:6.0+dfsg-2expubuntu1.3 qemu-system-arm 1:6.0+dfsg-2expubuntu1.3 qemu-system-mips 1:6.0+dfsg-2expubuntu1.3 qemu-system-misc 1:6.0+dfsg-2expubuntu1.3 qemu-system-ppc 1:6.0+dfsg-2expubuntu1.3 qemu-system-s390x 1:6.0+dfsg-2expubuntu1.3 qemu-system-sparc 1:6.0+dfsg-2expubuntu1.3 qemu-system-x86 1:6.0+dfsg-2expubuntu1.3 qemu-system-x86-microvm 1:6.0+dfsg-2expubuntu1.3 qemu-system-x86-xen 1:6.0+dfsg-2expubuntu1.3
Ubuntu 20.04 LTS: qemu-system 1:4.2-3ubuntu6.23 qemu-system-arm 1:4.2-3ubuntu6.23 qemu-system-mips 1:4.2-3ubuntu6.23 qemu-system-misc 1:4.2-3ubuntu6.23 qemu-system-ppc 1:4.2-3ubuntu6.23 qemu-system-s390x 1:4.2-3ubuntu6.23 qemu-system-sparc 1:4.2-3ubuntu6.23 qemu-system-x86 1:4.2-3ubuntu6.23 qemu-system-x86-microvm 1:4.2-3ubuntu6.23 qemu-system-x86-xen 1:4.2-3ubuntu6.23
Ubuntu 18.04 LTS: qemu-system 1:2.11+dfsg-1ubuntu7.40 qemu-system-arm 1:2.11+dfsg-1ubuntu7.40 qemu-system-mips 1:2.11+dfsg-1ubuntu7.40 qemu-system-misc 1:2.11+dfsg-1ubuntu7.40 qemu-system-ppc 1:2.11+dfsg-1ubuntu7.40 qemu-system-s390x 1:2.11+dfsg-1ubuntu7.40 qemu-system-sparc 1:2.11+dfsg-1ubuntu7.40 qemu-system-x86 1:2.11+dfsg-1ubuntu7.40
After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes.
References: ubuntu.com/security/notices/USN-5489-1 CVE-2021-3507, CVE-2021-3929, CVE-2021-4206, CVE-2021-4207, CVE-2022-0358, CVE-2022-26353, CVE-2022-26354
Package Information: launchpad.net/ubuntu/+source/qemu/1:6.2+dfsg-2ubuntu6.2 launchpad.net/ubuntu/+source/qemu/1:6.0+dfsg-2expubuntu1.3 launchpad.net/ubuntu/+source/qemu/1:4.2-3ubuntu6.23 launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.40