[Ksplice][Ubuntu-20.10-Updates] New Ksplice updates for Ubuntu 20.10 Groovy (USN-4887-1)

[Oracle Ksplice]

Synopsis: USN-4887-1 can now be patched using Ksplice
CVEs: CVE-2020-27170 CVE-2020-27171 CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 CVE-2021-3444

Systems running Ubuntu 20.10 Groovy can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-4887-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 20.10
Groovy 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-2021-27363, CVE-2021-27364, CVE-2021-27365: Privilege escalation in iSCSI subsystem.

Multiple logic errors failing to check some messages and sysfs
attribute sizes may cause a buffer overflow.  A local attacker could
use this to cause a privilege escalation.


* CVE-2020-27170, CVE-2020-27171: Information disclosure in BPF verifier.

Multiple flaws in the BPF verifier implementation could result in
incorrect arithmetic operations. A local user could use these flaws
to cause information disclosure.


* CVE-2021-3444: Multiple vulnerabilities in BPF verifier.

A flaw in The BPF verifier implementation could result in out-of-bounds
reads or out-of-bounds writes. A local attacker with the ability to load
bpf programs could use this flaw to cause information disclosure or
code execution.

SUPPORT

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