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Red Hat Virtualization 4: RHSA-2021-1050-01 Moderate: Open vSwitch DoS

red hat
Calendar Grey March 31, 2021
Dist Redhat Esm H88
The new openvswitch2.11 update for Red Hat Virtualization has been rated as a moderate impact release, fixing vulnerabilities that might result in Denial of Service (DoS) incidents
An update for openvswitch2.11 is now available in Red Hat Virtualization

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

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

https://access.redhat.com/articles/2974891

Summary

Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic.
Security Fix(es):
* 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)
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.

Topics%20covered

Topics Covered

security advisory network security DoS issue memory leak security impact DoS fix openvswitch security impact moderate Red Hat Virtualization network bridging openvswitch2.11

References

https://access.redhat.com/security/cve/CVE-2020-27827 https://access.redhat.com/security/cve/CVE-2020-35498 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts:
Source: openvswitch2.11-2.11.3-86.el7fdp.src.rpm ovn2.11-2.11.1-57.el7fdp.src.rpm
ppc64le: openvswitch2.11-2.11.3-86.el7fdp.ppc64le.rpm openvswitch2.11-debuginfo-2.11.3-86.el7fdp.ppc64le.rpm openvswitch2.11-devel-2.11.3-86.el7fdp.ppc64le.rpm ovn2.11-2.11.1-57.el7fdp.ppc64le.rpm ovn2.11-debuginfo-2.11.1-57.el7fdp.ppc64le.rpm ovn2.11-host-2.11.1-57.el7fdp.ppc64le.rpm ovn2.11-vtep-2.11.1-57.el7fdp.ppc64le.rpm python-openvswitch2.11-2.11.3-86.el7fdp.ppc64le.rpm
x86_64: openvswitch2.11-2.11.3-86.el7fdp.x86_64.rpm openvswitch2.11-debuginfo-2.11.3-86.el7fdp.x86_64.rpm openvswitch2.11-devel-2.11.3-86.el7fdp.x86_64.rpm ovn2.11-2.11.1-57.el7fdp.x86_64.rpm ovn2.11-debuginfo-2.11.1-57.el7fdp.x86_64.rpm ovn2.11-host-2.11.1-57.el7fdp.x86_64.rpm ovn2.11-vtep-2.11.1-57.el7fdp.x86_64.rpm python-openvswitch2.11-2.11.3-86.el7fdp.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:1050-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1050
Issue date: 2021-03-31

Topic

An update for openvswitch2.11 is now available in Red Hat Virtualization.Red Hat Product Security has rated this update as having a security impactofModerate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory network security DoS issue memory leak security impact DoS fix openvswitch security impact moderate Red Hat Virtualization network bridging openvswitch2.11

Relevant Releases Architectures

Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - ppc64le, x86_64

Bugs Fixed

1908845 - CVE-2020-35498 openvswitch: limitation in the OVS packet parsing in userspace leads to DoS

1921438 - CVE-2020-27827 lldp/openvswitch: denial of service via externally triggered memory leak

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