[QSA-0413221] Linux kernel vulnerabilities
Qlustar Security Advisory 0413221
April 13th, 2022
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-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 5.4.180. 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 5.4.180 up to the current Qlustar kernel 5.4.188:
Linux kernel 5.4.188 Linux kernel 5.4.187 Linux kernel 5.4.186 Linux kernel 5.4.185 Linux kernel 5.4.184 Linux kernel 5.4.183 Linux kernel 5.4.182 Linux kernel 5.4.181
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 4.19.229. 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 4.19.229 up to the current Qlustar kernel 4.19.237:
Linux kernel 4.19.237 Linux kernel 4.19.236 Linux kernel 4.19.235 Linux kernel 4.19.234 Linux kernel 4.19.233 Linux kernel 4.19.232 Linux kernel 4.19.231 Linux kernel 4.19.230
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 5.4.188-ql-generic-12.0-16
qlustar-module-core-focal-amd64-12.0.0 12.0.0.10-b547f1432
qlustar-module-core-centos7-amd64-12.0.0 12.0.0.10-b547f1432
qlustar-module-core-centos8-amd64-12.0.0 12.0.0.10-b547f1432
For Qlustar 11.0
linux-image-ql-generic 4.19.237-ql-generic-11.0-30
qlustar-module-core-bionic-amd64-11.0.1 11.0.1.14-b543f1431
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.