-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
CVE-2021-41079 Apache Tomcat
16 September 2021
AusCERT Security Bulletin Summary
Product: Apache Tomcat
Publisher: Apache Software Foundation
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2021-41079
- --------------------------BEGIN INCLUDED TEXT--------------------
CVE-2021-41079 Denial of Service
Vendor: The Apache Software Foundation
Apache Tomcat 10.0.0-M1 to 10.0.2
Apache Tomcat 9.0.0-M1 to 9.0.43
Apache Tomcat 8.5.0 to 8.5.63
When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a
specially crafted packet could be used to trigger an infinite loop
resulting in a denial of service.
Users of the affected versions should apply one of the following
- - Upgrade to Apache Tomcat 10.0.4 or later
- - Upgrade to Apache Tomcat 9.0.44 or later
- - Upgrade to Apache Tomcat 8.5.64 or later
Note: This issue was fixed in Apache Tomcat 10.0.3 but the release vote
for the 10.0.3 release candidate did not pass. Therefore, although users
must download 10.0.4 to obtain a version that includes a fix for this
issue, version 10.0.3 is not included in the list of affected versions.
The Apache Tomcat Security Team would like to thank:
- - Thomas Wozenilek for originally reporting this issue
- - David Frankson of Infinite Campus for providing a test case that
reproduced the issue.
2021-09-15 Original advisory
- --------------------------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 firstname.lastname@example.org
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
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-----
-----END PGP SIGNATURE-----