[Ksplice][EL7-Updates] New Ksplice updates for OL 7, RHEL 7, CentOS 7, and Scientific Linux 7 (RHSA-2021:2314)

[Gregory Herrero]

Synopsis: RHSA-2021:2314 can now be patched using Ksplice
CVEs: CVE-2020-12362 CVE-2020-12363 CVE-2020-12364 CVE-2020-27170 CVE-2020-27171 CVE-2020-8648 CVE-2021-3347

Systems running RHCK on Oracle Linux 7, Red Hat Enterprise Linux 7,
CentOS 7, and Scientific Linux 7 can now use Ksplice to patch against
the latest Red Hat Security Advisory, RHSA-2021:2314.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running OL 7, RHEL 7,
CentOS 7, and Scientific Linux 7 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-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-2020-8648: Use-after-free in the virtual terminal driver.

A locking error in the virtual terminal driver could lead to a
use-after-free. A local attacker could use this flaw to cause a denial-
of-service or escalate privileges.


* CVE-2021-3347: Privilege escalation in the Fast Userspace Mutexes.

A flaw in the Fast Userspace Mutexes implementation could lead to
a use-after-free. A local user could use this flaw to crash the system
or escalate their privileges.


* CVE-2020-12362, CVE-2020-12363 and CVE-2020-12364: Privilege escalation in Intel 8xx/9xx/G3x/G4x/HD Graphics driver.

An issue with Intel 8xx/9xx/G3x/G4x/HD Graphics firmware could lead to
an integer overflow or a NULL pointer dereference. A local attacker
could use this flaw to cause a denial-of-service or escalate
privileges.

SUPPORT

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