UBUNTU-CVE-2020-10761

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Source
https://ubuntu.com/security/CVE-2020-10761
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-10761.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2020-10761
Upstream
Downstream
Related
Published
2020-06-09T13:15:00Z
Modified
2025-09-08T16:46:02Z
Severity
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L CVSS Calculator
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.

References

Affected packages

Ubuntu:20.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:4.2-3ubuntu6.4?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:4.2-3ubuntu6.4

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-block-extra"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-kvm"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-data"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-gui"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-s390x"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-x86-microvm"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-system-x86-xen"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-user-binfmt"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "1:4.2-3ubuntu6.4",
            "binary_name": "qemu-utils"
        }
    ],
    "availability": "No subscription required"
}