UBUNTU-CVE-2021-3748

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Source

https://ubuntu.com/security/CVE-2021-3748

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3748.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3748

Related

Published

2021-08-31T00:00:00Z

Modified

2024-11-20T12:14:53Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

References

Affected packages

Ubuntu:18.04:LTS / qemu

Package

Name: qemu
Purl: pkg:deb/ubuntu/qemu?arch=src?distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:2.11+dfsg-1ubuntu7.39

Affected versions

1:2.*

1:2.10+dfsg-0ubuntu3

1:2.10+dfsg-0ubuntu4

1:2.10+dfsg-0ubuntu5

1:2.11+dfsg-1ubuntu1

1:2.11+dfsg-1ubuntu2

1:2.11+dfsg-1ubuntu4

1:2.11+dfsg-1ubuntu5

1:2.11+dfsg-1ubuntu6

1:2.11+dfsg-1ubuntu7

1:2.11+dfsg-1ubuntu7.1

1:2.11+dfsg-1ubuntu7.2

1:2.11+dfsg-1ubuntu7.3

1:2.11+dfsg-1ubuntu7.4

1:2.11+dfsg-1ubuntu7.5

1:2.11+dfsg-1ubuntu7.6

1:2.11+dfsg-1ubuntu7.7

1:2.11+dfsg-1ubuntu7.8

1:2.11+dfsg-1ubuntu7.9

1:2.11+dfsg-1ubuntu7.10

1:2.11+dfsg-1ubuntu7.12

1:2.11+dfsg-1ubuntu7.13

1:2.11+dfsg-1ubuntu7.14

1:2.11+dfsg-1ubuntu7.15

1:2.11+dfsg-1ubuntu7.17

1:2.11+dfsg-1ubuntu7.18

1:2.11+dfsg-1ubuntu7.19

1:2.11+dfsg-1ubuntu7.20

1:2.11+dfsg-1ubuntu7.21

1:2.11+dfsg-1ubuntu7.22

1:2.11+dfsg-1ubuntu7.23

1:2.11+dfsg-1ubuntu7.25

1:2.11+dfsg-1ubuntu7.26

1:2.11+dfsg-1ubuntu7.27

1:2.11+dfsg-1ubuntu7.28

1:2.11+dfsg-1ubuntu7.29

1:2.11+dfsg-1ubuntu7.31

1:2.11+dfsg-1ubuntu7.32

1:2.11+dfsg-1ubuntu7.33

1:2.11+dfsg-1ubuntu7.34

1:2.11+dfsg-1ubuntu7.35

1:2.11+dfsg-1ubuntu7.36

1:2.11+dfsg-1ubuntu7.37

1:2.11+dfsg-1ubuntu7.38

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-block-extra"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-block-extra-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-guest-agent-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-kvm"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-arm-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-common-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-mips-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-misc-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-ppc-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-s390x"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-s390x-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-sparc-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-system-x86-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-user-binfmt"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-user-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-user-static-dbgsym"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-utils"
        },
        {
            "binary_version": "1:2.11+dfsg-1ubuntu7.39",
            "binary_name": "qemu-utils-dbgsym"
        }
    ]
}

Ubuntu:20.04:LTS / qemu

Package

Name: qemu
Purl: pkg:deb/ubuntu/qemu?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:4.2-3ubuntu6.21

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

1:4.2-3ubuntu6.12

1:4.2-3ubuntu6.14

1:4.2-3ubuntu6.15

1:4.2-3ubuntu6.16

1:4.2-3ubuntu6.17

1:4.2-3ubuntu6.18

1:4.2-3ubuntu6.19

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-block-extra"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-block-extra-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-guest-agent-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-kvm"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-arm-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-common-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-data"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-gui"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-gui-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-mips-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-misc-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-ppc-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-s390x"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-s390x-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-sparc-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-x86-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-x86-microvm"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-x86-microvm-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-x86-xen"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-system-x86-xen-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-user-binfmt"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-user-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-user-static-dbgsym"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-utils"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.21",
            "binary_name": "qemu-utils-dbgsym"
        }
    ]
}

Ubuntu:22.04:LTS / qemu

Package

Name: qemu
Purl: pkg:deb/ubuntu/qemu?arch=src?distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:6.2+dfsg-2ubuntu5

Affected versions

1:6.*

1:6.0+dfsg-2expubuntu1

1:6.0+dfsg-2expubuntu2

1:6.0+dfsg-2expubuntu4

Ecosystem specific

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-block-extra"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-block-extra-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-guest-agent-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-arm-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-common-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-data"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-gui"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-gui-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-mips-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-misc-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-ppc-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-s390x"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-s390x-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-sparc-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-x86-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-x86-microvm"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-x86-xen"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-system-x86-xen-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-user-binfmt"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-user-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-user-static-dbgsym"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-utils"
        },
        {
            "binary_version": "1:6.2+dfsg-2ubuntu5",
            "binary_name": "qemu-utils-dbgsym"
        }
    ]
}