[QSA-0413221] Linux kernel vulnerabilities
Qlustar Security Advisory 0413221
April 13th, 2022
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
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-amd64-12.0.0 220.127.116.11-b547f1432 qlustar-module-core-centos7-amd64-12.0.0 18.104.22.168-b547f1432 qlustar-module-core-centos8-amd64-12.0.0 22.214.171.124-b547f1432
For Qlustar 11.0
linux-image-ql-generic 4.19.237-ql-generic-11.0-30 qlustar-module-core-bionic-amd64-11.0.1 126.96.36.199-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 188.8.131.52-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.