CVE-2021-28700

Published on: 08/27/2021 12:00:00 AM UTC

Last Modified on: 09/24/2021 11:15:00 PM UTC

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Certain versions of Fedora from Fedoraproject contain the following vulnerability:

xen/arm: No memory limit for dom0less domUs The dom0less feature allows an administrator to create multiple unprivileged domains directly from Xen. Unfortunately, the memory limit from them is not set. This allow a domain to allocate memory beyond what an administrator originally configured.

  • CVE-2021-28700 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo Xen - xen version 4.12.x
  • Affected Vendor/Software: URL Logo Xen - xen version ?< 4.12
  • Affected Vendor/Software: URL Logo Xen - xen version >= 4.13.x
  • Affected Vendor/Software: URL Logo Xen - xen version !> xen-unstable

CVSS3 Score: 4.9 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW HIGH NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED NONE NONE HIGH

CVSS2 Score: 6.8 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK LOW SINGLE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
NONE NONE COMPLETE

CVE References

Description Tags Link
xenbits.xenproject.org
text/plain
URL Logo MISC xenbits.xenproject.org/xsa/advisory-383.txt
[SECURITY] Fedora 33 Update: xen-4.14.2-3.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2021-4f129cc0c1
No Description Provided lists.fedoraproject.org

Inactive LinkNot Archived
URL Logo FEDORA FEDORA-2021-081f9bf5d2
Debian -- Security Information -- DSA-4977-1 xen www.debian.org
Depreciated Link
text/html
URL Logo DEBIAN DSA-4977
[SECURITY] Fedora 34 Update: xen-4.14.2-3.fc34 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2021-d68ed12e46

Related QID Numbers

  • 178798 Debian Security Update for xen (DSA 4977-1)
  • 281879 Fedora Security Update for xen (FEDORA-2021-4f129cc0c1)
  • 281880 Fedora Security Update for xen (FEDORA-2021-d68ed12e46)
  • 751074 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2925-1)
  • 751083 SUSE Enterprise Linux Security Update for xen (SUSE-SU-2021:2924-1)
  • 751100 OpenSUSE Security Update for xen (openSUSE-SU-2021:2923-1)
  • 751111 OpenSUSE Security Update for xen (openSUSE-SU-2021:1236-1)

Exploit/POC from Github

PoC for exploiting CVE-2021-28700 : xen/arm: No memory limit for dom0less domUs The dom0less feature allows an admini…

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
FedoraprojectFedora33AllAllAll
Operating
System
FedoraprojectFedora34AllAllAll
Operating
System
XenXenAllAllAllAll
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*:
  • cpe:2.3:o:xen:xen:*:*:*:*:*:*:arm:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-28700 : xen/arm: No memory limit for dom0less domUs The dom0less feature allows an administrator to creat… twitter.com/i/web/status/1… 2021-08-27 18:20:39
Twitter Icon @0_exploit CVE-2021-28700 dlvr.it/S6SgSr 2021-08-27 21:33:02
Twitter Icon @threatmeter CVE-2021-28700 xen/arm: No memory limit for dom0less domUs The dom0less feature allows an administrator to create m… twitter.com/i/web/status/1… 2021-08-28 07:09:41
Twitter Icon @SecRiskRptSME RT: CVE-2021-28700 xen/arm: No memory limit for dom0less domUs The dom0less feature allows an administrator to cre… twitter.com/i/web/status/1… 2021-08-28 07:33:52
Twitter Icon @threatmeter Xen dom0less resource consumption [CVE-2021-28700] A vulnerability, which was classified as problematic, has been f… twitter.com/i/web/status/1… 2021-08-29 07:50:55
© CVE.report 2022 Twitter Nitter Twitter Viewer |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

CVE.report and Source URL Uptime Status status.cve.report