[QSA-0219222] Security Update Bundle

Qlustar Security Advisory 0219222

February 19th, 2022

Summary:

A Qlustar security update bundle is a cumulative update of packages that are taken from upstream Debian/Ubuntu without modification. Only packages that are used in a typical HPC/Storage cluster installation are mentioned in Qlustar Security Advisories. Other non-HPC related updates also enter the Qlustar repository, but their functionality is not separately verified by the Qlustar team. To track these updates subscribe to the general security mailing lists of Debian/Ubuntu and/or CentOS/AlmaLinux.

Package(s)       : see upstream description of individual package
Qlustar releases : 11.0, 12.0
Affected versions: All versions prior to this update
Vulnerability    : see upstream description of individual package
Problem type     : see upstream description of individual package
Qlustar-specific : no
CVE Id(s)        : see upstream description of individual package

This update includes several security related package updates from Debian/Ubuntu and CentOS/AlmaLinux. The following list provides references to the upstream security report of the corresponding packages. You can view the original upstream advisory by clicking on the corresponding title.

Relevant to Qlustar 12.0 and 11.0

util-linux vulnerabilities

It was discovered that util-linux incorrectly handled unmounting FUSE filesystems. A local attacker could possibly use this issue to unmount FUSE filesystems belonging to other users.

Samba vulnerabilities

Orange Tsai discovered that the Samba vfs_fruit module incorrectly handled certain memory operations. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service, or possibly execute arbitrary code as root.

Michael Hanselmann discovered that Samba incorrectly created directories. In certain configurations, a remote attacker could possibly create a directory on the server outside of the shared directory.

Kees van Vloten discovered that Samba incorrectly handled certain aliased SPN checks. A remote attacker could possibly use this issue to impersonate services.

Vim vulnerabilities

It was discovered that vim incorrectly handled memory when opening and searching the contents of certain files. If a user was tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service, or possibly achieve code execution with user privileges.

It was discovered that vim incorrectly handled memory when opening and editing certain files. If a user was tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service, or possibly achieve code execution with user privileges.

It was discovered that vim incorrectly handled memory when opening and editing certain files. If a user was tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service, or possibly achieve code execution with user privileges.

It was discovered that vim incorrectly handled memory when opening and editing certain files. If a user was tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service, or possibly achieve code execution with user privileges.

systemd vulnerability

It was discovered that systemd-tmpfiles employed uncontrolled recursion when removing deeply nested directory hierarchies. A local attacker could exploit this to cause systemd-tmpfiles to crash or have other unspecified impacts.

Apache HTTP Server vulnerabilities

It was discovered that the Apache HTTP Server incorrectly handled certain forward proxy requests. A remote attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly perform a Server Side Request Forgery attack.

It was discovered that the Apache HTTP Server Lua module incorrectly handled memory in the multipart parser. A remote attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code.

CentOS 7.9 / AlmaLinux 8.5 security updates

Please check the CentOS mailing list for details about CentOS 7 updates and the AlmaLinux Errata site for details about AlmaLinux 8 updates that entered this release (everything from December 21st, 2021 to February 18th, 2021).

Update instructions:

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

For Qlustar 12.0

qlustar-module-core-focal-amd64-12.0.0     12.0.0.9-b547f1429
qlustar-module-core-centos7-amd64-12.0.0   12.0.0.9-b547f1429
qlustar-module-core-centos8-amd64-12.0.0   12.0.0.9-b547f1429

For Qlustar 11.0

qlustar-module-core-bionic-amd64-11.0.1    11.0.1.13-b543f1428

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.