CVE-2021-28693 — XEN vulnerability

4 documents4 sources
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 81.38%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
XENDebian XEN
Timeline
PublishedJun 30
Latest updateMay 24

Description

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶CVEListV5xen/xen4.13.x — unspecified+3
▶debiandebian/xen< xen 4.14.2+25-gb6a8c4f72d-1 (bookworm)
▶Debianxen/xen< 4.14.2+25-gb6a8c4f72d-1+3
▶NVDxen/xen4.12.0 — 4.15.0+1

🔴Vulnerability Details

2
GHSA
GHSA-jpfw-vm34-2p3p: xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e↗2022-05-24
▶
OSV
CVE-2021-28693: xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e↗2021-06-30
▶

📋Vendor Advisories

1
Debian
CVE-2021-28693: xen - xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e....↗2021
▶