[QSA-0724211]
Linux kernel vulnerabilities

Qlustar Security Advisory 0724211

July 24th, 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 5.4.128. 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 5.4.128 up to the current Qlustar kernel 5.4.134:

Linux kernel 5.4.134
Linux kernel 5.4.133
Linux kernel 5.4.132
Linux kernel 5.4.131
Linux kernel 5.4.130
Linux kernel 5.4.129

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 4.19.195. 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 4.19.195 up to the current Qlustar kernel 4.19.198:

Linux kernel 4.19.198
Linux kernel 4.19.197
Linux kernel 4.19.196

In particular, there is a local root exploit bug in the linux kernels prior to these updates.

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                     5.4.134-ql-generic-12.0-10
qlustar-module-core-focal-amd64-12.0.0     12.0.0.5-b542f1391
qlustar-module-core-centos7-amd64-12.0.0   12.0.0.5-b542f1391
qlustar-module-core-centos8-amd64-12.0.0   12.0.0.5-b542f1391

For Qlustar 11.0

linux-image-ql-generic                     4.19.198-ql-generic-11.0-25
qlustar-module-core-bionic-amd64-11.0.1    11.0.1.9-b543f1392
qlustar-module-core-centos7-amd64-11.0.1   11.0.1.9-b543f1392
qlustar-module-core-centos8-amd64-11.0.1   11.0.1.9-b543f1392

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.
• 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.