What is the severity of CVE-2021-28693?

The CVE-2021-28693 vulnerability is considered to have a moderate severity due to potential data leakage from boot modules.

How do I fix CVE-2021-28693?

To mitigate CVE-2021-28693, users should upgrade to a patched version of Xen that includes the necessary scrubbing of boot modules.

What systems are affected by CVE-2021-28693?

CVE-2021-28693 affects Xen versions between 4.12.0 and 4.15.0, including the specific 4.15.0-rc1 release.

What type of vulnerability is CVE-2021-28693?

CVE-2021-28693 is a security vulnerability that primarily relates to improper handling of sensitive data during the boot process.

Can CVE-2021-28693 be exploited remotely?

CVE-2021-28693 requires local access to the Xen environment for exploitation, which limits the potential for remote attacks.

Vulnerability/
CVE-2021-28693

medium

5.5

30/6/2021

3/8/2024

CVE-2021-28693

First published: Wed Jun 30 2021(Updated: )

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.

Credit: security@xen.org

Affected Software	Affected Version	How to fix
Xen xen-unstable	>=4.12.0<=4.15.0
Xen xen-unstable	=4.15.0-rc1

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Frequently Asked Questions

What is the severity of CVE-2021-28693?
The CVE-2021-28693 vulnerability is considered to have a moderate severity due to potential data leakage from boot modules.
How do I fix CVE-2021-28693?
To mitigate CVE-2021-28693, users should upgrade to a patched version of Xen that includes the necessary scrubbing of boot modules.
What systems are affected by CVE-2021-28693?
CVE-2021-28693 affects Xen versions between 4.12.0 and 4.15.0, including the specific 4.15.0-rc1 release.
What type of vulnerability is CVE-2021-28693?
CVE-2021-28693 is a security vulnerability that primarily relates to improper handling of sensitive data during the boot process.
Can CVE-2021-28693 be exploited remotely?
CVE-2021-28693 requires local access to the Xen environment for exploitation, which limits the potential for remote attacks.

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collector/mitre-cve
source/MITRE
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agent/author
agent/last-modified-date
agent/description
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/xen
canonical/xen xen-unstable
version/xen xen-unstable/4.12.0
version/xen xen-unstable/4.15.0
version/xen xen-unstable/4.15.0-rc1

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