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Red Hat Security Advisory

Synopsis: Moderate: keepalived security and bug fix update
Advisory ID: RHSA-2019:2285-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2285
Issue date: 2019-08-06
CVE Names: CVE-2018-19044
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1. Summary:

An update for keepalived is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server (v. 7) – ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) – x86_64

3. Description:

The keepalived utility provides simple and robust facilities for load
balancing and high availability. The load balancing framework relies on the
well-known and widely used IP Virtual Server (IPVS) kernel module providing
layer-4 (transport layer) load balancing. Keepalived implements a set of
checkers to dynamically and adaptively maintain and manage a load balanced
server pool according to the health of the servers. Keepalived also
implements the Virtual Router Redundancy Protocol (VRRPv2) to achieve high
availability with director failover.

Security Fix(es):

* keepalived: Improper pathname validation allows for overwrite of
arbitrary filenames via symlinks (CVE-2018-19044)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.7 Release Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1651863 – CVE-2018-19044 keepalived: Improper pathname validation allows for overwrite of arbitrary filenames via symlinks
1667292 – vrrp_script broken from v1.3.0 with syntax “</dev/tcp/127.0.0.1/22”

6. Package List:

Red Hat Enterprise Linux Server (v. 7):

Source:
keepalived-1.3.5-16.el7.src.rpm

ppc64le:
keepalived-1.3.5-16.el7.ppc64le.rpm
keepalived-debuginfo-1.3.5-16.el7.ppc64le.rpm

x86_64:
keepalived-1.3.5-16.el7.x86_64.rpm
keepalived-debuginfo-1.3.5-16.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
keepalived-1.3.5-16.el7.src.rpm

x86_64:
keepalived-1.3.5-16.el7.x86_64.rpm
keepalived-debuginfo-1.3.5-16.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-19044
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2019 Red Hat, Inc.
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