[Ksplice][Ubuntu-20.04-Updates] New Ksplice updates for Ubuntu 20.04 Focal (USN-5804-1)

[Oracle Ksplice]

Synopsis: USN-5804-1 can now be patched using Ksplice
CVEs: CVE-2022-3643 CVE-2022-42896 CVE-2022-43945 CVE-2022-45934

Systems running Ubuntu 20.04 Focal can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-5804-1.

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-2022-42896: Use-after-free in Bluetooth L2CAP.

A flaw in Bluetooth L2CAP protocol when accepting incoming connection
requests could lead to a use-after-free. A remote attacker could use
this flaw for a denial-of-service or for privilege escalation.


* CVE-2022-3643: Denial-of-host-service via malicious Xen netfront packet.

The Xen netback handler does not properly handle packets with protocol
headers that span multiple slots. A malicious guest might exploit this
to crash certain varieties of network interface on the host.


* CVE-2022-43945: Out-of-bounds memory access in NFSD.

A logic error in NFSD when a small RPC Call message arrives in an
oversized RPC record can lead to a buffer overflow. A remote attacker
could use this flaw for a denial-of-service or privilege escalation.


* CVE-2022-45934: Denial-of-Service in Bluetooth L2CAP.

And integer overflow flaw in Bluetooth L2CAP when sending L2CAP
configuration request packets could result in a system crash. A local
user could use this flaw to cause a denial-of-service.

SUPPORT

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