Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.3421
JSA11211 - 2021-10 Security Bulletin: Junos OS Evolved: BGP and LDP
sessions with TCP MD5 authentication established with peers
not configured for authentication (CVE-2021-0297)
15 October 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS Evolved
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-0297
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11211
- --------------------------BEGIN INCLUDED TEXT--------------------
2021-10 Security Bulletin: Junos OS Evolved: BGP and LDP sessions with TCP MD5 authentication established with peers not configured for authentication (CVE-2021-0297)
Article ID : JSA11211
Last Updated: 13 Oct 2021
Version : 1.0
Product Affected:
This issue affects all versions of Junos OS Evolved.
Problem:
A vulnerability in the processing of TCP MD5 authentication in Juniper Networks
Junos OS Evolved may allow a BGP or LDP session configured with MD5
authentication to succeed, even if the peer does not have TCP MD5
authentication enabled. This could lead to untrusted or unauthorized sessions
being established, resulting in an impact on confidentiality or stability of
the network.
This issue affects Juniper Networks Junos OS Evolved:
o All versions prior to 20.3R2-S1-EVO;
o 20.4 versions prior to 20.4R2-EVO;
o 21.1 versions prior to 21.1R2-EVO.
Juniper Networks Junos OS is not affected by this issue.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was found during internal product security testing or research.
This issue has been assigned CVE-2021-0297 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS Evolved 20.3R2-S1-EVO, 20.4R2-EVO, 21.1R2-EVO, 21.2R1-EVO, and
all subsequent releases.
This issue is being tracked as 1569843 .
Workaround:
There are no known workarounds for this issue.
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-10-13: Initial Publication.
CVSS Score:
6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
Severity Level:
Medium
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
- --------------------------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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=fAH3
-----END PGP SIGNATURE-----