UBUNTU-CVE-2020-27821

A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.

References

Affected packages

Ubuntu:20.04:LTS / qemu

Package

Name: qemu
Purl: pkg:deb/ubuntu/qemu@1:4.2-3ubuntu6.12?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:4.2-3ubuntu6.12

Affected versions

1:4.*

1:4.0+dfsg-0ubuntu9

1:4.0+dfsg-0ubuntu10

1:4.2-1ubuntu1

1:4.2-1ubuntu2

1:4.2-3ubuntu1

1:4.2-3ubuntu2

1:4.2-3ubuntu3

1:4.2-3ubuntu4

1:4.2-3ubuntu5

1:4.2-3ubuntu6

1:4.2-3ubuntu6.1

1:4.2-3ubuntu6.2

1:4.2-3ubuntu6.3

1:4.2-3ubuntu6.4

1:4.2-3ubuntu6.5

1:4.2-3ubuntu6.6

1:4.2-3ubuntu6.7

1:4.2-3ubuntu6.8

1:4.2-3ubuntu6.9

1:4.2-3ubuntu6.10

1:4.2-3ubuntu6.11

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "qemu",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-kvm",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-common",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-data",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-gui",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-x86-microvm",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-system-x86-xen",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-user",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-user-static",
            "binary_version": "1:4.2-3ubuntu6.12"
        },
        {
            "binary_name": "qemu-utils",
            "binary_version": "1:4.2-3ubuntu6.12"
        }
    ],
    "availability": "No subscription required"
}