Input validation error in Xen - CVE-2021-28709
Published: November 24, 2021
Vulnerability identifier: #VU58352
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-2021-28709
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 insufficient validation of user-supplied input in insertion of new pages code path. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
Xen
Oracle VM Server for x86
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
Oracle VM Server for x86
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-2021-28709
Install updates from vendor's website.
Xen - addressed in versions 4.12.0, 4.13.0, 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
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