PT-2021-4064 · Xen+1 · Xen+1

Julien Grall · Published 2021-03-10 · Updated 2021-09-21 · CVE-2021-28693

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Xen (affected versions not specified)

Description The issue is related to the Xen hypervisor on Arm, where boot modules such as the kernel and initramfs are not properly scrubbed. This could allow an attacker to access sensitive data. The bootloader loads these modules into a temporary area before they are copied to each domain's memory by Xen. To prevent data leakage, Xen should scrub these modules before allocating the pages. However, it was found that this scrubbing does not occur on Arm platforms.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

BDU:2021-04605

CVE-2021-28693

OPENSUSE-SU-2021:1236-1

OPENSUSE-SU-2021:2923-1

OPENSUSE-SU-2021_1236-1

OPENSUSE-SU-2021_2923-1

SUSE-SU-2021:2922-1

SUSE-SU-2021:2923-1

SUSE-SU-2021:2924-1

SUSE-SU-2021:2925-1

Affected Products

Suse

Xen

References · 69

• https://osv.dev/vulnerability/ALPINE-CVE-2021-28693 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2922-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-28693 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1236-1 · Vendor Advisory
• https://xenbits.xenproject.org/xsa/advisory-372.txt · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-28693 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2021:2924-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-28693 · Security Note
• https://bdu.fstec.ru/vul/2021-04605 · Security Note
• https://security.gentoo.org/glsa/202107-30 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-28693 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:2923-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2925-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-28693 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-28693 · Vendor Advisory