[QSA-0325231] Linux kernel vulnerabilities

Qlustar Security Advisory 0325231

March 25th, 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 5.15.93. 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 5.15.93 up to the current Qlustar kernel 5.15.104:

Linux kernel 5.15.104
Linux kernel 5.15.103
Linux kernel 5.15.102
Linux kernel 5.15.101
Linux kernel 5.15.100
Linux kernel 5.15.99
Linux kernel 5.15.98
Linux kernel 5.15.97
Linux kernel 5.15.96
Linux kernel 5.15.95
Linux kernel 5.15.94

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 5.4.231. 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 5.4.231 up to the current Qlustar kernel 5.4.238:

Linux kernel 5.4.238
Linux kernel 5.4.237
Linux kernel 5.4.236
Linux kernel 5.4.235
Linux kernel 5.4.234
Linux kernel 5.4.233
Linux kernel 5.4.232

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 4.19.272. 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 4.19.272 up to the current Qlustar kernel 4.19.279:

Linux kernel 4.19.279
Linux kernel 4.19.278
Linux kernel 4.19.277
Linux kernel 4.19.276
Linux kernel 4.19.275
Linux kernel 4.19.274
Linux kernel 4.19.273

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                     5.15.104-ql-generic-13.0-4
qlustar-module-core-jammy-amd64-13.0       13.0.2-b564f1479
qlustar-module-core-centos8-amd64-13.0     13.0.2-b564f1479

For Qlustar 12.0

linux-image-ql-generic                     5.4.238-ql-generic-12.0-23
qlustar-module-core-focal-amd64-12.0.2     12.0.2.2-b560f1480
qlustar-module-core-centos7-amd64-12.0.2   12.0.2.2-b560f1480

For Qlustar 11.0

linux-image-ql-generic                     4.19.279-ql-generic-11.0-37
qlustar-module-core-bionic-amd64-11.0.1    11.0.1.21-b562f1476

Special Update instructions:

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

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.