Debian Security Advisory

DLA-3410-1 openvswitch -- LTS security update

Date Reported:
01 May 2023
Affected Packages:
openvswitch
Vulnerable:
Yes
Security database references:
In the Debian bugtracking system: Bug 1034042.
In Mitre's CVE dictionary: CVE-2023-1668.
More information:

David Marchand discovered that Open vSwitch, a multilayer, software-based, Ethernet virtual switch, was vulnerable to crafted IP packets with ip proto set to 0, potentially causing a denial of service.

Triggering the vulnerability requires an attacker to send a crafted IP packet with protocol field set to 0 and the flow rules to contain set actions on other fields in the IP protocol header. The resulting flows will omit required actions, and fail to mask the IP protocol field, resulting in a large bucket which captures all IP packets.

For Debian 10 buster, this problem has been fixed in version 2.10.7+ds1-0+deb10u4.

We recommend that you upgrade your openvswitch packages.

For the detailed security status of openvswitch please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openvswitch

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS