CVE-2021-28711

Published on: 01/05/2022 12:00:00 AM UTC

Last Modified on: 04/06/2022 04:18:00 PM UTC

CVE-2021-28711

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Certain versions of Debian Linux from Debian contain the following vulnerability:

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

  • CVE-2021-28711 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo Linux - Linux version ? consult Xen advisory XSA-391

CVSS3 Score: 6.5 - MEDIUM

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
LOCAL LOW LOW NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
CHANGED NONE NONE HIGH

CVSS2 Score: 2.1 - LOW

Access
Vector ⓘ		 Access
Complexity		 Authentication
LOCAL LOW NONE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
NONE NONE PARTIAL

CVE References

Description Tags ⓘ Link
[SECURITY] [DLA 2941-1] linux-4.19 security update lists.debian.org
text/html
 URL Logo MLIST [debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update
[SECURITY] [DLA 2940-1] linux security update lists.debian.org
text/html
 URL Logo MLIST [debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update
xenbits.xenproject.org
text/plain
 URL Logo MISC xenbits.xenproject.org/xsa/advisory-391.txt
Debian -- Security Information -- DSA-5050-1 linux www.debian.org
Depreciated Link
text/html
 URL Logo DEBIAN DSA-5050
Debian -- Security Information -- DSA-5096-1 linux www.debian.org
Depreciated Link
text/html
 URL Logo DEBIAN DSA-5096
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Related QID Numbers

  • 179012 Debian Security Update for linux (DSA 5050-1)
  • 179117 Debian Security Update for linux (DSA 5096-1)
  • 179118 Debian Security Update for linux (DLA 2940-1)
  • 179119 Debian Security Update for linux-4.19 (DLA 2941-1)
  • 198678 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5298-1)
  • 198708 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5337-1)
  • 198709 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5338-1)
  • 198731 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5368-1)
  • 198740 Ubuntu Security Notification for Linux kernel (BlueField) Vulnerabilities (USN-5377-1)
  • 282190 Fedora Security Update for kernel (FEDORA-2021-e6cbca1e9e)
  • 282191 Fedora Security Update for kernel (FEDORA-2021-4f1a2cdf2e)
  • 353130 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-021
  • 353151 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2022-009
  • 353160 Amazon Linux Security Advisory for kernel : ALAS2-2022-1749
  • 353161 Amazon Linux Security Advisory for kernel : ALAS-2022-1563
  • 353242 Amazon Linux Security Advisory for kernel : ALAC2012-2022-036
  • 353243 Amazon Linux Security Advisory for kmod-mlx5 : ALAC2012-2022-037
  • 353244 Amazon Linux Security Advisory for kmod-sfc : ALAC2012-2022-038
  • 354747 Amazon Linux Security Advisory for kernel : ALAS-2023-1688
  • 376925 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2022:0125)
  • 671448 EulerOS Security Update for kernel (EulerOS-SA-2022-1450)
  • 671474 EulerOS Security Update for kernel (EulerOS-SA-2022-1429)
  • 671505 EulerOS Security Update for kernel (EulerOS-SA-2022-1489)
  • 671535 EulerOS Security Update for kernel (EulerOS-SA-2022-1508)
  • 751590 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0056-1)
  • 751600 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0068-1)
  • 751602 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0080-1)
  • 751622 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0131-1)
  • 751654 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0197-1)
  • 751695 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0367-1)
  • 751697 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0366-1)
  • 751698 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0362-1)
  • 751701 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2022:0366-1)
  • 751702 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0371-1)
  • 751989 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0131-1)
  • 753133 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0181-1)
  • 753264 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0079-1)
  • 753355 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2022:0056-1)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System		DebianDebian Linux10.0AllAllAll
Operating
System		DebianDebian Linux11.0AllAllAll
Operating
System		DebianDebian Linux9.0AllAllAll
Operating
System		XenXen-AllAllAll
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @oss_security Xen Security Advisory 391 v3 (CVE-2021-28711,CVE-2021-28712,CVE-2021-28713) - Rogue backends can cause DoS of guest… twitter.com/i/web/status/1… 2021-12-20 16:31:12
Twitter Icon @CVEreport CVE-2021-28711 : Rogue backends can cause #DoS of guests via high frequency events T[his CNA information record re… twitter.com/i/web/status/1… 2022-01-05 16:18:48
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