[Ksplice][Ubuntu-22.04-Updates] New Ksplice updates for Ubuntu 22.04 Jammy (USN-6386-1)

[Oracle Ksplice]

Synopsis: USN-6386-1 can now be patched using Ksplice
CVEs: CVE-2023-20588 CVE-2023-40283 CVE-2023-4128 CVE-2023-4207 CVE-2023-4569 CVE-2023-4911

Systems running Ubuntu 22.04 Jammy can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-6386-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 22.04
Jammy 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-2023-4911: Buffer overflow in the GNU C Library's dynamic loader while processing environment variables.

Incorrect processing of environment variables in the GNU C Library's
dynamic loader ld.so can result in buffer overflow. This flaw could
allow a local attacker to elevate their privileges when launching
binaries with SUID permission.


* CVE-2023-4128, CVE-2023-4207: Use-after-free in netfilter classifiers.

Incorrectly copied structures in multiple netfilter classifiers can lead
to a use-after-free when updating a filter bound to a class. An attacker
could use this flaw for privilege escalation or cause a
denial-of-service.


* CVE-2023-40283: Use-after-free in Bluetooth L2CAP.

A flaw in Bluetooth L2CAP when releasing an L2CAP socket may lead to a
use-after-free. An attacker could use this flaw for privilege escalation
or a denial-of-service.


* CVE-2023-4569: Denial-of-service in netfilter nf_tables.

Incorrectly disabled catch-all set elements may result in a memory leak.
An attacker could use this flaw to exhaust the system's memory and
eventually cause a denial-of-service.


* CVE-2023-20588: Information disclosure on AMD CPUs.

A hardware flaw on some AMD processors when handling division-by-zero
errors may result in speculative data exposure. An attacker could use this
flaw to access sensitive information.

SUPPORT

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