RHSA-2021:2077 - Security Advisory

Topic

An update for openvswitch is now available in Fast Datapath for Red Hat
Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. 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.

Description

Open vSwitch provides standard network bridging functions and support for
the OpenFlow protocol for remote per-flow control of traffic.

Security Fix(es):

• lldpd: buffer overflow in the lldp_decode function in daemon/protocols/lldp.c

(CVE-2015-8011)

• openvswitch: limitation in the OVS packet parsing in userspace leads to DoS

(CVE-2020-35498)

• lldp/openvswitch: denial of service via externally triggered memory leak

(CVE-2020-27827)

Solution

For details on how to apply this update, refer to:

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

Affected Products

• Red Hat Enterprise Linux Fast Datapath 7 x86_64
• Red Hat Virtualization - Extended Update Support 4.2 for RHEL 7.6 x86_64
• Red Hat Enterprise Linux Fast Datapath (for RHEL Server for IBM Power LE) 7 ppc64le
• Red Hat Enterprise Linux Fast Datapath (for IBM z Systems) 7 s390x

Fixes

• BZ - 1896536 - CVE-2015-8011 lldpd: buffer overflow in the lldp_decode function in daemon/protocols/lldp.c
• BZ - 1908845 - CVE-2020-35498 openvswitch: limitation in the OVS packet parsing in userspace leads to DoS
• BZ - 1921438 - CVE-2020-27827 lldp/openvswitch: denial of service via externally triggered memory leak
• BZ - 1950032 - Update openvswitch to 2.9.9

CVEs

• CVE-2015-8011
• CVE-2020-27827
• CVE-2020-35498

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/security/updates/classification#important