Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2015.1234
CVE-2014-0230 Denial of Service
6 May 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Apache Tomcat
Publisher: The Apache Software Foundation
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-0230
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
CVE-2014-0230 Denial of Service
Severity: Low
Vendor: The Apache Software Foundation
Versions Affected:
- - - Apache Tomcat 8.0.0-RC1 to 8.0.8
- - - Apache Tomcat 7.0.0 to 7.0.54
- - - Apache Tomcat 6.0.0 to 6.0.43
Description:
When a response for a request with a request body is returned to the
user agent before the request body is fully read, by default Tomcat
swallows the remaining request body so that the next request on the
connection may be processed. There was no limit to the size of request
body that Tomcat would swallow. This permitted a limited Denial of
Service as Tomcat would never close the connection and a processing
thread would remain allocated to the connection.
Note that this issue was accidentally disclosed by Red Hat Product
Security on 9 April 2015 [4]. The Tomcat security team was made aware
of this disclosure today (5 May 2015). The information released on 9
April 2015 contained a number of errors. For the sake of clarity:
- - - This issue is not limited to file upload. Any request with a body may
be affected.
- - - This issue cannot be used to trigger excessive memory usage on the
server. The additional data read from the response body is not
retained - it is simply ignored.
The intention was to embargo this issue until after the 6.0.44
release. Unfortunately that is no longer possible. The Tomcat team is
working on a 6.0.44 release now and we hope to have one available by
early next week.
Mitigation:
Users of affected versions should apply one of the following mitigations
- - - Upgrade to Apache Tomcat 8.0.9 or later
- - - Upgrade to Apache Tomcat 7.0.55 or later
- - - Upgrade to Apache Tomcat 6.0.44 or later once released
Credit:
This issue was discovered by AntBean@secdig from the Baidu Security Team
and was reported responsibly to the Apache Tomcat security team.
References:
[1] http://tomcat.apache.org/security-8.html
[2] http://tomcat.apache.org/security-7.html
[3] http://tomcat.apache.org/security-6.html
[4] http://www.openwall.com/lists/oss-security/2015/04/10/1
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=AfA+
- -----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:
http://www.auscert.org.au/render.html?cid=1980
===========================================================================
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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=QekI
-----END PGP SIGNATURE-----