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Wednesday, December 9, 2020

ESB-2020.4323 – [Debian] openssl: Denial of service – Remote/unauthenticated

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.4323
                          openssl security update
                              9 December 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           openssl
Publisher:         Debian
Operating System:  Debian GNU/Linux
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-1971  

Reference:         ESB-2020.4320

Original Bulletin: 
   https://www.debian.org/security/2020/dsa-4807

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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-4807-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
December 08, 2020                     https://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : openssl
CVE ID         : CVE-2020-1971

David Benjamin discovered a flaw in the GENERAL_NAME_cmp() function
which could cause a NULL dereference, resulting in denial of service.

Additional details can be found in the upstream advisory:
https://www.openssl.org/news/secadv/20201208.txt

For the stable distribution (buster), this problem has been fixed in
version 1.1.1d-0+deb10u4.

We recommend that you upgrade your openssl packages.

For the detailed security status of openssl please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/openssl

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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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.
===========================================================================
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