El-errata: New Ksplice updates for UEKR5 4.14.35 on OL7 (ELSA-2021-9084)
Synopsis: ELSA-2021-9084 can now be patched using Ksplice
CVEs: CVE-2020-16120 CVE-2021-3347 CVE-2021-3348
Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2021-9084.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2021-9084.html
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack running UEKR5 4.14.35
on 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
* CVE-2021-3348: Use-after-free due to bad locking in Network block device.
A missing locking in Network block device could lead to use-after-free
when setting up a device. A local user could use this flaw to cause
a denial-of-service or to execute code.
Orabug: 32447287
* 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.
Orabug: 32447189
* CVE-2020-16120: Read permission bypass with overlay filesystem.
A logic error in the overlay filesystem may cause the kernel to not properly
perform all required permission checks. A local attacker could use this to
bypass intended access restrictions.
Orabug: 32435220
SUPPORT
Ksplice support is available at ksplice-support_ww@oracle.com.
New Ksplice updates for UEKR5 4.14.35 on Oracle Linux 7 has been released.
