CVE-2021-28693

Published on: 06/30/2021 12:00:00 AM UTC

Last Modified on: 09/21/2021 04:14:00 PM UTC

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

Certain versions of Xen from Xen contain the following vulnerability:

xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must "scrub" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.

  • CVE-2021-28693 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 5.5 - MEDIUM

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

CVSS2 Score: 2.1 - LOW

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

CVE References

Description Tags Link
xenbits.xenproject.org
text/plain
URL Logo MISC xenbits.xenproject.org/xsa/advisory-372.txt
Xen: Multiple vulnerabilities (GLSA 202107-30) — Gentoo security security.gentoo.org
text/html
URL Logo GENTOO GLSA-202107-30

Related QID Numbers

  • 281644 Fedora Security Update for xen (FEDORA-2021-993693c914)
  • 281645 Fedora Security Update for xen (FEDORA-2021-41d4347447)
  • 710038 Gentoo Linux Xen Multiple vulnerabilities (GLSA 202107-30)
  • 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)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
XenXenAllAllAllAll
Operating
System
XenXen4.15.0rc1AllAll
Operating
System
XenXenAllAllAllAll
  • cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*:
  • cpe:2.3:o:xen:xen:4.15.0:rc1:*:*:*:*:*:*:
  • cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @oss_security Xen Security Advisory 372 v3 (CVE-2021-28693) - xen/arm: Boot modules are not scrubbed: Posted by Xen . org securit… twitter.com/i/web/status/1… 2021-06-08 19:43:04
Twitter Icon @autumn_good_35 CVE-2021-28690 CVE-2021-0089、CVE-2021-26313 CVE-2021-28691 CVE-2021-28692 CVE-2021-28693 Xen Security Advisories… twitter.com/i/web/status/1… 2021-06-10 13:54:44
Twitter Icon @CVEreport CVE-2021-28693 : xen/arm: Boot modules are not scrubbed The bootloader will load boot modules e.g. #kernel, initr… twitter.com/i/web/status/1… 2021-06-30 10:38:20
Twitter Icon @threatmeter CVE-2021-28693 xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs… twitter.com/i/web/status/1… 2021-07-01 07:10:31
Reddit Logo Icon /r/netcve CVE-2021-28693 2021-06-30 11:41:42
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