[QSA-1221211] Linux kernel vulnerabilities
Qlustar Security Advisory 1221211
December 21st, 2021
Summary:
The system could crash or be made to run programs as an administrator.
Package(s) : linux-image-ql-generic,
qlustar-module-core-bionic-amd64-11.0.1,
qlustar-module-core-centos7-amd64-11.0.1,
qlustar-module-core-centos8-amd64-11.0.1,
qlustar-module-core-focal-amd64-12.0.0,
qlustar-module-core-centos7-amd64-12.0.0,
qlustar-module-core-centos8-amd64-12.0.0
Qlustar releases : 11.0, 12.0
Affected versions: All versions prior to this update
Vulnerability : privilege escalation/denial of service
Problem type : local
Qlustar-specific : no
CVE Id(s) : Not documented
A number of vulnerabilities and bugs have been discovered in the 5.4.x Linux kernel series since the last Qlustar 12.0 release based on 5.4.153. They may lead to a denial of service or privilege escalation. Please check the following web pages that contain details of the fixes in each release after 5.4.153 up to the current Qlustar kernel 5.4.167:
Linux kernel 5.4.167 Linux kernel 5.4.166 Linux kernel 5.4.165 Linux kernel 5.4.164 Linux kernel 5.4.163 Linux kernel 5.4.162 Linux kernel 5.4.161 Linux kernel 5.4.160 Linux kernel 5.4.159 Linux kernel 5.4.158 Linux kernel 5.4.157 Linux kernel 5.4.156 Linux kernel 5.4.155 Linux kernel 5.4.154
A number of vulnerabilities and bugs have been discovered in the 4.19.x Linux kernel series since the last Qlustar 11.0 release based on 4.19.211. They may lead to a denial of service or privilege escalation. Please check the following web pages that contain details of the fixes in each release after 4.19.211 up to the current Qlustar kernel 4.19.221:
Linux kernel 4.19.221 Linux kernel 4.19.220 Linux kernel 4.19.219 Linux kernel 4.19.218 Linux kernel 4.19.217 Linux kernel 4.19.216 Linux kernel 4.19.215 Linux kernel 4.19.214 Linux kernel 4.19.213 Linux kernel 4.19.212
Update instructions:
The problem can be corrected by updating your system to the following or more recent package versions:
For Qlustar 12.0
linux-image-ql-generic 5.4.167-ql-generic-12.0-13
qlustar-module-core-focal-amd64-12.0.0 12.0.0.8-b546f1425
qlustar-module-core-centos7-amd64-12.0.0 12.0.0.8-b546f1425
qlustar-module-core-centos8-amd64-12.0.0 12.0.0.8-b546f1425
For Qlustar 11.0
linux-image-ql-generic 4.19.221-ql-generic-11.0-28
qlustar-module-core-bionic-amd64-11.0.1 11.0.1.12-b543f1424
qlustar-module-core-centos7-amd64-11.0.1 11.0.1.12-b543f1424
qlustar-module-core-centos8-amd64-11.0.1 11.0.1.12-b543f1424
Special Update instructions:
In addition to the steps described in the general Qlustar Update Instructions these updates require the following:
- On Qlustar 12: Also write the dnsmasq config with QluMan before rebooting. If your cluster
was installed with a release earlier than 12.0.0.8-b546f1425 you will have to generate new
LDAP certificates at some point since the earlier ones were generated with a 1 year validity.
Now they are generated with an unlimited validity. To check the expiration date execute
# openssl x509 -dates -in /etc/ssl/certs/qlustar-ca-cert.pem | grep notAfter
To regenerate the certificate with unlimited validity execute
# qluman-ldap-cli --update-certs
before rebooting the whole cluster.
- On Qlustar 11: Also perform the manual steps ‘7. Migration to GRUB PXE booting’ and ‘11. Adjust root bash shell initialization’ as described in the Release Notes if you haven’t done so yet.