Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2022.5862
dropbear security update
14 November 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: dropbear
Publisher: Debian
Operating System: Debian GNU/Linux
Resolution: Patch/Upgrade
CVE Names: CVE-2021-36369
Original Bulletin:
https://lists.debian.org/debian-lts-announce/2022/11/msg00015.html
Comment: CVSS (Max): 7.5 CVE-2021-36369 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
- - -----------------------------------------------------------------------
Debian LTS Advisory DLA-3187-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Utkarsh Gupta
November 14, 2022 https://wiki.debian.org/LTS
- - -----------------------------------------------------------------------
Package : dropbear
Version : 2018.76-5+deb10u2
CVE ID : CVE-2021-36369
An issue was discovered in Dropbear, a relatively small SSH server and
client. Due to a non-RFC-compliant check of the available authentication
methods in the client-side SSH code, it was possible for an SSH server
to change the login process in its favor. This attack can bypass
additional security measures such as FIDO2 tokens or SSH-Askpass. Thus,
it allows an attacker to abuse a forwarded agent for logging on to
another server unnoticed.
For Debian 10 buster, this problem has been fixed in version
2018.76-5+deb10u2.
We recommend that you upgrade your dropbear packages.
For the detailed security status of dropbear please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/dropbear
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
- -----BEGIN PGP SIGNATURE-----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=df9d
- -----END PGP SIGNATURE-----
- --------------------------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: https://auscert.org.au/gpg-key/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=ChgI
-----END PGP SIGNATURE-----