CVE-2021-28712

Aliases:UBUNTU-CVE-2021-28712DEBIAN-CVE-2021-28712
Advisory lineage Upstream: 0 Downstream: 32
Modified
Published: 05 Jan 2022, 16:10
Last modified:03 Aug 2024, 21:55

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.33% LOW
0% probability +0.29%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

05 Jan 2022, 16:10
Published
Vulnerability first disclosed
03 Aug 2024, 21:55
Last Modified
Vulnerability information updated

Description

Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.33%• Percentile: 27%

Affected Systems

  • debian•linux

    < 5.10.92-1 | < 5.15.15-1 | < 5.15.15-1 | < 5.15.15-1

  • ubuntu•linux

    all | < 4.4.0-239.273 | < 4.15.0-169.177 | < 5.4.0-105.119

  • ubuntu•linux-aws

    < 4.4.0-1117.123 | < 4.4.0-1155.170 | < 4.15.0-1121.129 | < 5.4.0-1069.73

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    < 5.13.0-1019.21~20.04.1

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1069.73~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2061.63 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1120.128~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1131.144~14.04.1 | < 4.15.0-1131.144~16.04.1 | all | < 5.4.0-1073.76

  • ubuntu•linux-azure-4.15

    < 4.15.0-1131.144

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    < 5.13.0-1021.24~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1073.76~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde-5.15

    < 5.15.0-1114.123~20.04.1

  • ubuntu•linux-azure-fips

    < 4.15.0-2043.47 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1032.35

  • ubuntu•linux-dell300x

    < 4.15.0-1035.40

  • ubuntu•linux-fips

    < 4.4.0-1088.95 | all | < 4.15.0-1078.87 | < 5.4.0-1046.52

  • ubuntu•linux-gcp

    < 4.15.0-1116.130~16.04.1 | all | < 5.4.0-1068.72

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1116.130

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    < 5.13.0-1021.25~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1068.72~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2026.28 | all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1066.69

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1066.69~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1037.38

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1037.38~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-169.177~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    < 5.13.0-37.42~20.04.1

  • ubuntu•linux-hwe-5.4

    < 5.4.0-105.119~18.04.1

  • ubuntu•linux-hwe-5.8

    all

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-ibm

    < 5.4.0-1018.20

  • ubuntu•linux-ibm-5.4

    < 5.4.0-1018.20~18.04.1

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1118.128 | < 4.15.0-1107.109 | < 5.4.0-1059.62

  • ubuntu•linux-lts-xenial

    < 4.4.0-239.273~14.04.1

  • ubuntu•linux-oem

    all

Showing first 50 affected entries in server-rendered view.

References (17)