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Red Hat 7 RHSA-2021:0834-01 Moderate: openvswitch DoS Threat

red hat
Calendar Grey March 15, 2021
Dist Redhat Esm H88
Red Hat issues a significant patch for openvswitch2.11 concerning Fast Datapath in RHEL 7. Implement updates without delay.
An update for openvswitch2.11 is now available in Fast Datapath for Red Hat Enterprise Linux 7

Solution

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

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

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 Red Hat DoS moderate severity openvswitch Fast Datapath

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

Fast Datapath for Red Hat Enterprise Linux 7:
Source: openvswitch2.11-2.11.3-86.el7fdp.src.rpm
noarch: openvswitch2.11-test-2.11.3-86.el7fdp.noarch.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 python-openvswitch2.11-2.11.3-86.el7fdp.ppc64le.rpm
s390x: openvswitch2.11-2.11.3-86.el7fdp.s390x.rpm openvswitch2.11-debuginfo-2.11.3-86.el7fdp.s390x.rpm openvswitch2.11-devel-2.11.3-86.el7fdp.s390x.rpm python-openvswitch2.11-2.11.3-86.el7fdp.s390x.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 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


Advisory ID: RHSA-2021:0834-01
Product: Fast Datapath
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0834
Issue date: 2021-03-15

Topic

An update for openvswitch2.11 is now available in Fast Datapath for Red HatEnterprise Linux 7.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 Red Hat DoS moderate severity openvswitch Fast Datapath

Relevant Releases Architectures

Fast Datapath for Red Hat Enterprise Linux 7 - noarch, ppc64le, s390x, 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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