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AUSCERT External Security Bulletin Redistribution
ESB-2021.3032
USN-5065-1: Open vSwitch vulnerability
9 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Open vSwitch
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-36980
Original Bulletin:
https://ubuntu.com/security/notices/USN-5065-1
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-5065-1: Open vSwitch vulnerability
08 September 2021
Open vSwitch could be made to crash or run programs if it received
specially crafted network traffic.
Releases
o Ubuntu 21.04
o Ubuntu 20.04 LTS
Packages
o openvswitch - Ethernet virtual switch
Details
It was discovered that Open vSwitch incorrectly handled decoding RAW_ENCAP
actions. A remote attacker could use this issue to cause Open vSwitch to
crash, resulting in a denial of service, or possibly execute arbitrary
code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o openvswitch-common - 2.15.0-0ubuntu3.1
Ubuntu 20.04
o openvswitch-common - 2.13.3-0ubuntu0.20.04.2
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-36980
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