[El-errata] New Ksplice updates for UEKR3 3.8.13 on OL6 and OL7 (ELSA-2019-4600)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2019-4600 can now be patched using Ksplice
CVEs: CVE-2018-10877 CVE-2018-10879 CVE-2018-10881 CVE-2018-10882

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2019-4600.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2019-4600.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-2018-10882: Out-of-bounds access when unmounting a crafted ext4 filesystem.

A logic error when unmounting a crafted ext4 filesystem could lead to an
out-of-bounds access. A local attacker could use this flaw to cause a
denial-of-service.

Orabug: 29545567


* CVE-2018-10881: Data corruption when using indirect blocks with ext4 filesystem.

A missing data zeroing when using indirect blocks with ext4 filesystem
could lead to data corruption or a kernel assert. A local attacker could
use this flaw to cause a denial-of-service.

Orabug: 29540710


* CVE-2018-10879: Use-after-free when setting extended attribute entry on ext4 filesystem.

A logic error when setting extended attribute entry on ext4 filesystem
could lead to a use-after-free. A local attacker could use this flaw
with a crafted ext4 filesystem to cause a denial-of-service.

Orabug: 29437128


* CVE-2018-10877: Out-of-bounds access when using corrupted ext4 filesystem with abnormal extent tree.

A missing check when using corrupted ext4 filesystem with abnormal
extent tree could lead to an out-of-bounds access. A local attacker
could use this flaw with a crafted ext4 image to cause a
denial-of-service.

Orabug: 29396713

SUPPORT

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