[Ksplice][Ubuntu-Oracle-Updates] New Ksplice updates for Ubuntu OCI kernel (USN-5114-1)

[Oracle Ksplice]

Synopsis: USN-5114-1 can now be patched using Ksplice
CVEs: CVE-2020-3702 CVE-2021-38198 CVE-2021-40490 CVE-2021-42008

Systems running Ubuntu OCI kernel can now use Ksplice to patch against
the latest Ubuntu Security Notice, USN-5114-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu OCI
kernel 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-2021-40490: Race condition in ext4 subsystem.

A logic error in the ext4 subsystem may lead to a race condition. This
may allow a local attacker to undermine system integrity and possibly
execute arbitrary code.


* CVE-2021-38198: Denial-of-service when using shadow paging with KVM guests.

A missing check when using shadow paging with KVM guests could lead to a
page fault. A local attacker could use this flaw to cause a denial-of-
service.


* CVE-2021-42008: Out-of-bounds access in Serial port 6PACK driver.

A missing validation check flaw in data decoding of the Serial port
6PACK driver could lead to out-of-bounds writing. A local privileged
user could use this flaw to cause a denial-of-service or execute
arbitrary code.


* CVE-2020-3702: Information disclosure in Atheros Wireless Card drivers.

A race condition flaw in layer 2 Wi-Fi encryption of Atheros Wireless
Card drivers could result in improper encryption. A specifically
handcrafted traffic could be created by a remote attacker and cause
information disclosure.

SUPPORT

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