[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELBA-2021-9433)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2021-9433 can now be patched using Ksplice
CVEs: CVE-2020-14304 CVE-2021-22555 CVE-2021-32399

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2021-9433.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2021-9433.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR4 4.1.12 on
OL6 and OL7 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

* NULL-pointer dereference when driver logs in/out of system.

If a SCSI error occurred and caused a target reset while the driver was
logging in or out, a race condition could result in the remote port
structure pointer being NULL, causing an invalid dereference and
denial-of-service.

Orabug: 33048899


* CVE-2021-32399: Race condition when removing bluetooth HCI controller.

A race condition when removing bluetooth HCI controller could result in
race condition and out-of-bounds write. A malicious unprivileged user
might able to exploit this to cause a denial-of-service or escalate
their privileges.

Orabug: 32912036


* CVE-2021-22555: Privilege escalation in Netfilter due to out-of-bounds 
memory write.

A heap out-of-bounds write in netfilter could allow an attacker to gain
privileges or cause a denial-of-service.

Orabug: 33093028


* CVE-2020-14304: Information leak in Mellanox ethernet driver.

A memory disclosure flaw in ethernet drivers, in the way it reads data 
from the
EEPROM of the device, could allow a local user to read uninitialized values
from the kernel memory.

Orabug: 31895301


* Deadlock in Xen network backend driver.

Certain operations in the Xen network backend driver while interrupts are
disabled can cause deadlocks. A malicious or buggy frontend can cause a
denial-of-service.

Orabug: 33277550

SUPPORT

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