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Ubuntu 21.10 USN-5242-1 Critical: Open vSwitch DoS Issue

ubuntu
Calendar Grey January 20, 2022
Dist Ubuntu Esm H88
Users of Ubuntu 21.10 are advised to perform immediate updates due to a vulnerability in Open vSwitch that can lead to system crashes when handling specially crafted network packets.
Open vSwitch could be made to hang or crash if it received specially crafted network traffic.

Summary

Open vSwitch could be made to hang or crash if it received specially

crafted network traffic.

Software Description:

- openvswitch: Ethernet virtual switch

Details:

It was discovered that Open vSwitch incorrectly handled certain fragmented

packets. A remote attacker could possibly use this issue to cause Open

vSwitch to consume resources, leading to a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service ubuntu traffic manipulation openvswitch

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.10:
  openvswitch-common              2.16.0-0ubuntu2.1

In general, a standard system update will make all the necessary changes.

References

CVE-2021-3905

Severity
critical
Lowest
Low
Medium
High
Critical

January 20, 2022

Topics%20covered

Topics Covered

security advisory denial of service ubuntu traffic manipulation openvswitch

Package Information

https://launchpad.net/ubuntu/+source/openvswitch/2.16.0-0ubuntu2.1

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