Exploit/Advisories

==========================================================================
Ubuntu Security Notice USN-5598-1
September 05, 2022

linux-oracle vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description:
- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the virtual terminal driver in the Linux kernel
did not properly handle VGA console font changes, leading to an
out-of-bounds write. A local attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
linux-image-4.15.0-1105-oracle 4.15.0-1105.116
linux-image-oracle-lts-18.04 4.15.0.1105.112

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
https://ubuntu.com/security/notices/USN-5598-1
CVE-2021-33656

Package Information:
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1105.116

Comments are closed.