Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.1521
USN-4933-1: OpenVPN vulnerabilities
5 May 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: OpenVPN
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-15078 CVE-2020-11810
Reference: ESB-2020.1359
Original Bulletin:
https://ubuntu.com/security/notices/USN-4933-1
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4933-1: OpenVPN vulnerabilities
04 May 2021
Several security issues were fixed in OpenVPN.
Releases
o Ubuntu 21.04
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o openvpn - virtual private network software
Details
It was discovered that OpenVPN incorrectly handled certain data channel v2
packets. A remote attacker could possibly use this issue to inject packets
using a victim's peer-id. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. ( CVE-2020-11810 )
It was discovered that OpenVPN incorrectly handled deferred authentication.
When a server is configured to use deferred authentication, a remote
attacker could possibly use this issue to bypass authentication and access
control channel data. ( CVE-2020-15078 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o openvpn - 2.5.1-1ubuntu1.1
Ubuntu 20.10
o openvpn - 2.4.9-3ubuntu1.1
Ubuntu 20.04
o openvpn - 2.4.7-1ubuntu2.20.04.2
Ubuntu 18.04
o openvpn - 2.4.4-2ubuntu1.5
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-15078
o CVE-2020-11810
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=0Qds
-----END PGP SIGNATURE-----