[El-errata] New openssl updates available via Ksplice (ELSA-2018-3221)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2018-3221 can now be patched using Ksplice
CVEs: CVE-2017-3735 CVE-2018-0495 CVE-2018-0739

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2018-3221.

INSTALLING THE UPDATES

We recommend that all users of Ksplice on OL 7 install these updates.

You can install these updates by running:

# ksplice -y user upgrade

32-bit applications should be restarted after upgrading the on-disk
openssl RPMs and statically linked applications using
openssl should be rebuilt to include these fixes.

Ksplice user-space patching requires installation of Ksplice-aware
packages and the system must be rebooted after the first installation of
these packages.  Refer to the installation instructions for the Enhanced
Ksplice Client in the Ksplice User's Guide for more details.  Systems
may be prepared for Ksplice patching by installing the Ksplice aware
packages in advance, prior to installing the enhanced Ksplice client.

DESCRIPTION

* CVE-2018-0739: Denial-of-service in ASN.1 recursive definitions.

Constructed ASN.1 types with a recursive definition could result in a
stack overflow.  A malicious remote user could use this flaw against a
vulnerable application to trigger a crash and denial of service.


* CVE-2018-0495: Information leak in ECDSA signature side-channel.

A cache side-channel in ECDSA signatures could allow a local user to
leak key material.


* CVE-2017-3735: Information leak in X.509 certificate display.

An X.509 certificate with a malformed IPAddressFamily extension could
display an extra byte, leaking memory contents or causing a consumer to
misbehave.


Note: Ksplice will not be providing a zero-downtime update for
CVE-2018-0495 on OpenSSL 1.0.1e-60.0.1.ksplice1.el7_3.1 and older.
Applications requiring protection for CVE-2018-0495 should restart with
a newer version of OpenSSL.

SUPPORT

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