[El-errata] New Ksplice updates for UEKR2 2.6.39 on OL5 and OL6 (ELSA-2019-4601)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2019-4601 can now be patched using Ksplice
CVEs: CVE-2018-10877 CVE-2018-10882

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2019-4601.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2019-4601.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR2 2.6.39 on
OL5 and OL6 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: 29545568


* 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: 29396714


* Denial-of-service with x86 fpu code and aesni-intel.

A bug in the x86 fpu code could lead to interrupts being improperly
disabled in subsequent calls.  Specifically, this has been seen to
cause a kernel BUG() when a user process dumps code on an ecrypt fs
while aesni-intel is loaded.  In this case, all subsequent accesses
to the ecrypt fs filesystem will hang.  A malicious user could exploit
this to cause a denial-of-service.

Orabug: 28874707

SUPPORT

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