Hi,

The following vulnerability was published for openvswitch.

CVE-2020-27827[0]:
| lldp: avoid memory leak from bad packets

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2020-27827
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27827
[1] https://mail.openvswitch.org/pipermail/ovs-announce/2021-January/000269.html
[2] https://github.com/openvswitch/ovs/commit/78e712c0b1dacc2f12d2a03d98f083d8672867f0

Regards,
Salvatore

Hello,

Bug #980132 in openvswitch reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below and you can check the diff of the fix at:

https://salsa.debian.org/openstack-team/third-party/openvswitch/-/commit/b2467aed2d37594f4f06a59a6340d1f7fcea7524
------------------------------------------------------------------------
* CVE-2020-27827: denial of service attacks in which crafted LLDP packets
    could cause memory to be lost when allocating data to handle specific
    optional TLVs. Applied upstream patch: lldp: do not leak memory on multiple
    instances of TLVs (Closes: #980132).
------------------------------------------------------------------------

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/980132

We believe that the bug you reported is fixed in the latest version of
openvswitch, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 980132@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Thomas Goirand <zigo@debian.org> (supplier of updated openvswitch package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 15 Jan 2021 08:10:49 +0100
Source: openvswitch
Architecture: source
Version: 2.15.0~git20210104.def6eb1ea+dfsg1-4
Distribution: unstable
Urgency: high
Maintainer: Debian OpenStack <team+openstack@tracker.debian.org>
Changed-By: Thomas Goirand <zigo@debian.org>
Closes: 980132
Changes:
 openvswitch (2.15.0~git20210104.def6eb1ea+dfsg1-4) unstable; urgency=high
 .
   * CVE-2020-27827: denial of service attacks in which crafted LLDP packets
     could cause memory to be lost when allocating data to handle specific
     optional TLVs. Applied upstream patch: lldp: do not leak memory on multiple
     instances of TLVs (Closes: #980132).
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 e308d11989329b67edab9aa869f5638ec5f665c2 51812 openvswitch_2.15.0~git20210104.def6eb1ea+dfsg1-4.debian.tar.xz
 e475261b8146323dd8c5bd854ae453cd523d6f66 20149 openvswitch_2.15.0~git20210104.def6eb1ea+dfsg1-4_amd64.buildinfo
Checksums-Sha256:
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 8b5ef8b5ed85c223fd70270ec030b779 3316 net optional openvswitch_2.15.0~git20210104.def6eb1ea+dfsg1-4.dsc
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Hi Salvatore,

Thanks for the bug report.

Please find, attached, the debdiff to fix the CVE in Buster. Note that
Unstable/Sid has already been patched.

Please allow me to upload this to buster-security.

Cheers,

Thomas Goirand (zigo)

Hi Thomas,

*but* please respin the package and include the fix for CVE-2015-8011
as well, this is fixed in unstable already.

For details and upstream commit see:
https://security-tracker.debian.org/tracker/CVE-2015-8011

(while at it, please set urgency=high for consistency).

Can you repost a debdiff with the CVE-2015-8011 fix as well?

Can you test the package in production?

Regards,
Salvatore

Hi Thomas,

Actually about the DSA need of both issue I would like to clarify
first one aspect:

https://mail.openvswitch.org/pipermail/ovs-announce/2021-January/000268.html

We have found that Open vSwitch is subject to a remote code execution
exploit when LLDP processing is enabled on an interface.  By default,
interfaces are not configured to process LLDP messages.

(which probably reduces to denial of service with source
fortification)

https://mail.openvswitch.org/pipermail/ovs-announce/2021-January/000269.html

We have found that Open vSwitch is subject to a denial of service
exploit when LLDP processing is enabled on an interface.  By default,
interfaces are not configured to process LLDP messages.

What is your take here on the use of the LLDP processing beeing
enabled?

Regards,
Salvatore