Input validation error in Xen - CVE-2021-28704

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Main Vulnerability Database Vulnerabilities #VU58344

Input validation error in Xen - CVE-2021-28704

Published: November 24, 2021


Vulnerability identifier: #VU58344
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-28704
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in XENMEM_decrease_reservation operation. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


Affected software

Xen
xen (Debian package)
xen
xen-tools-domU-debuginfo
xen-tools-domU
xen-tools-debuginfo
xen-tools
xen-libs-debuginfo
xen-libs-debuginfo-32bit
xen-libs
xen-libs-32bit
xen-doc-html
xen-debugsource
xen-devel
xen-tools-xendomains-wait-disk
SUSE MicroOS
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
HPE Helion Openstack
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise Module for Server Applications
SUSE Linux Enterprise Module for Basesystem
Fedora

How to mitigate CVE-2021-28704

Install updates from vendor's website.

Xen - addressed in versions 4.14.0, 4.15.0
xen (Debian package) - update to 4.14.3+32-g9de3671772-1~deb11u1
xen - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-tools-domU-debuginfo - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-tools-domU - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-tools-debuginfo - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-tools - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-libs-debuginfo - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-libs-debuginfo-32bit - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1
xen-libs - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-libs-32bit - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1
xen-doc-html - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1
xen-debugsource - addressed in versions 4.7.6_18-43.82.1, 4.9.4_24-3.97.1, 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-devel - addressed in versions 4.12.4_16-3.55.1, 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen-tools-xendomains-wait-disk - addressed in versions 4.13.4_02-3.40.1, 4.14.3_04-3.15.1
xen - addressed in versions 4.14.3-3.fc33, 4.14.3-3.fc34, 4.15.1-4.fc35

External References

Related Security Bulletins