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AUSCERT External Security Bulletin Redistribution
ESB-2021.0493
USN-4729-1: Open vSwitch vulnerability
11 February 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Open vSwitch
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Virtualisation
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-35498
Original Bulletin:
https://ubuntu.com/security/notices/USN-4729-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running Open vSwitch check for an updated version of the software
for their operating system.
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USN-4729-1: Open vSwitch vulnerability
10 February 2021
Open vSwitch could be made to crash or perform unexpectedly if it received
specially crafted network traffic.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o openvswitch - Ethernet virtual switch
Details
Joakim Hindersson discovered that Open vSwitch incorrectly parsed certain
network packets. A remote attacker could use this issue to cause a denial
of service, or possibly alter packet classification.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o openvswitch-common - 2.13.1-0ubuntu1.3
Ubuntu 20.04
o openvswitch-common - 2.13.1-0ubuntu0.20.04.4
Ubuntu 18.04
o openvswitch-common - 2.9.8-0ubuntu0.18.04.2
Ubuntu 16.04
o openvswitch-common - 2.5.9-0ubuntu0.16.04.3
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-35498
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