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Debian LTS Advisory DLA-2571-1                [email protected]
https://www.debian.org/lts/security/                    Thorsten Alteholz
February 19, 2021                             https://wiki.debian.org/LTS
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Package        : openvswitch
Version        : 2.6.10-0+deb9u1
CVE ID         : CVE-2015-8011 CVE-2017-9214 CVE-2018-17204 CVE-2018-17206
                  CVE-2020-27827 CVE-2020-35498


Several issues have been found in openvswitch, a production quality, 
multilayer, software-based, Ethernet virtual switch.

CVE-2020-35498

     Denial of service attacks, in which crafted network packets
     could cause the packet lookup to ignore network header fields
     from layers 3 and 4. The crafted network packet is an ordinary
     IPv4 or IPv6 packet with Ethernet padding length above 255 bytes.
     This causes the packet sanity check to abort parsing header
     fields after layer 2.

CVE-2020-27827

     Denial of service attacks using crafted LLDP packets.

CVE-2018-17206

     Buffer over-read issue during BUNDLE action decoding.

CVE-2018-17204

     Assertion failure due to not validating information (group type
     and command) in OF1.5 decoder.

CVE-2017-9214

     Buffer over-read that is caused by an unsigned integer underflow.

CVE-2015-8011

     Buffer overflow in the lldp_decode function in
     daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote
     attackers to cause a denial of service (daemon crash) and
     possibly execute arbitrary code via vectors involving large
     management addresses and TLV boundaries.


For Debian 9 stretch, these problems have been fixed in version
2.6.10-0+deb9u1. This version is a new upstream point release.

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