[El-errata] New Ksplice updates for UEKR3 3.8.13 on OL6 and OL7 (ELSA-2020-5879)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2020-5879 can now be patched using Ksplice
CVEs: CVE-2016-10905 CVE-2017-8924 CVE-2017-8925 CVE-2019-19965 CVE-2019-20054 CVE-2020-14314 CVE-2020-25285

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2020-5879.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2020-5879.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR3 3.8.13 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

* CVE-2019-19965: Denial-of-service in SCSI device removal.

A race condition when probing SCSI devices could result in a NULL
pointer dereference and kernel crash.  A local user with privileges to
add or remove SCSI devices could use this flaw to crash the system.

Orabug: 30770914


* CVE-2019-20054: Denial-of-service in procfs sysctl removal.

A missing NULL pointer check could result in a NULL pointer derefence
and kernel crash when removing a sysctl table from procfs.  A local,
privileged user could use this flaw to crash the system.

Orabug: 30732940


* CVE-2020-14314: Denial-of-service in ext4 file system due to a broken indexing.

A memory out-of-bounds reads could happen in ext4 file system due to
a broken indexing. This flaw could allow a local user to crash the
system and cause a denial-of-service.

Orabug: 31895332


* CVE-2017-8924: Information leak in Digi Edgeport TI callback completion.

An integer underflow in the Digi Edgeport TI USB driver can allow a malicious
USB device to leak the contents of kernel memory to userspace.

Orabug: 31352085


* CVE-2017-8925: Memory leak when opening an Omninet serial driver.

An extra reference on the TTY was taken in the Omninet serial driver on
open, leading to a memory leak.  A local, unprivileged user could use this
flaw to exhaust the memory on the system and cause a denial-of-service.

Orabug: 30484762


* CVE-2020-25285: Denial-of-service in sysctls of Linux Memory Manager.

A race condition in sysctls of Linux Kernel Virtual Memory Manager
could lead to NULL pointer dereference. A local attacker could use
this flaw to cause a denial-of-service.

Orabug: 31884241


* CVE-2016-10905: Use-after-free in GFS2 file system.

A logic error when using resource group to keep track of block
allocation in GFS2 filesystem could lead to a use-after-free. A local
attacker could use this flaw to cause a denial-of-service.

Orabug: 30254252

SUPPORT

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