[Ksplice][Ubuntu-20.04-Updates] New Ksplice updates for Ubuntu 20.04 Focal (USN-6605-1)

[Oracle Ksplice]

Synopsis: USN-6605-1 can now be patched using Ksplice
CVEs: CVE-2023-6040 CVE-2023-6606 CVE-2023-6931 CVE-2023-6932

Systems running Ubuntu 20.04 Focal can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-6605-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 20.04
Focal install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2023-6931: Privilege escalation in Kernel Performance Events.

The Kernel Performance Events subsystem did not properly validate
all event sizes when attaching new events, which could lead to
an out-of-bounds write. A local attacker could use this flaw
to cause a denial-of-service or potentially escalate privileges.


* CVE-2023-6040: Privilege escalation in Netfilter.

The Netfilter subsystem did not properly validate network family
support while creating a new Netfilter table. A local attacker
could use this flaw to cause a denial-of-service or potentially
escalate privileges.


* CVE-2023-6606: Information disclosure in Common Internet File System.

The CIFS network file system implementation did not always
properly validate the server frame size, which could lead to
an out-of-bounds write. A local attacker could use this flaw
to cause a denial-of-service or potentially expose sensitive
information.


* CVE-2023-6932: Privilege escalation in IGMP.

A race condition in the IGMP protocol implementation could lead
to a use-after-free vulnerability. A local attacker could use
this flaw to cause a denial-of-service or potentially escalate
privileges.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.