[QSA-0614231]
Linux kernel vulnerabilities

Qlustar Security Advisory 0614231

June 14th, 2023

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-amd64-12.0.2,
                   qlustar-module-core-centos7-amd64-12.0.2,
                   qlustar-module-core-jammy-amd64-13.0,
                   qlustar-module-core-centos8-amd64-13.0
Qlustar releases : 11.0, 12.0, 13
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 5.15.x Linux kernel series since the last Qlustar 13.0 release based on 5.15.108. 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 5.15.108 up to the current Qlustar kernel 5.15.116:

Linux kernel 5.15.116
Linux kernel 5.15.115
Linux kernel 5.15.114
Linux kernel 5.15.113
Linux kernel 5.15.112
Linux kernel 5.15.111
Linux kernel 5.15.110
Linux kernel 5.15.109

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 5.4.241. 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 5.4.241 up to the current Qlustar kernel 5.4.246:

Linux kernel 5.4.246
Linux kernel 5.4.245
Linux kernel 5.4.244
Linux kernel 5.4.243
Linux kernel 5.4.242

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 4.19.281. 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 4.19.281 up to the current Qlustar kernel 4.19.285:

Linux kernel 4.19.285
Linux kernel 4.19.284
Linux kernel 4.19.283
Linux kernel 4.19.282

Update instructions:

The problem can be corrected by updating your system to the following or more recent package versions:

For Qlustar 13

linux-image-ql-generic                     5.15.116-ql-generic-13.0-6
qlustar-module-core-jammy-amd64-13.0       13.0.4-b565f1494
qlustar-module-core-centos8-amd64-13.0     13.0.4-b565f1494

For Qlustar 12.0

linux-image-ql-generic                     5.4.246-ql-generic-12.0-26
qlustar-module-core-focal-amd64-12.0.2     12.0.2.4-b566f1493
qlustar-module-core-centos7-amd64-12.0.2   12.0.2.4-b566f1493

For Qlustar 11.0

linux-image-ql-generic                     4.19.285-ql-generic-11.0-39
qlustar-module-core-bionic-amd64-11.0.1    11.0.1.23-b567f1495

Special Update instructions:

In addition to the steps described in the general Qlustar Update Instructions these updates require the following:

• On Qlustar 12 and 13, write the ssh config with QluMan before rebooting. This will switch the ssh known hosts keys to ed25519 from rsa and is necessary for host-based authentication to continue to work.
• On Qlustar 12, also perform the following manual steps if you haven’t done so yet: Write the dnsmasq and slurm 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.
  Please note that we no longer provide 12.x AlmaLinux 8 modules for Qlustar 12. If you want to use AlmaLinux 8 under Qlustar 12, please switch to the 13.x image modules and create a corresponding chroot for it.

• 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.