ESB-2018.0316 - [Win][UNIX/Linux] Apache Tomcat Native Connector: Unauthorised access - Remote/unauthenticated 2018-02-01

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

                               ESB-2018.0316
    CVE-2017-15698 Apache Tomcat Native Connector - OCSP check omitted
                              1 February 2018

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

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

Product:          Apache Tomcat Native Connector
Publisher:        Apache
Operating System: UNIX variants (UNIX, Linux, OSX)
                  Windows
Impact/Access:    Unauthorised Access -- Remote/Unauthenticated
Resolution:       Patch/Upgrade
CVE Names:        CVE-2017-15698  

- --------------------------BEGIN INCLUDED TEXT--------------------

CVE-2017-15698 Apache Tomcat Native Connector - OCSP check omitted

Severity: Moderate

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat Native 1.2.0 to 1.2.14
Apache Tomcat Native 1.1.23 to 1.1.34

Description:
When parsing the AIA-Extension field of a client certificate, Apache
Tomcat Native did not correctly handle fields longer than 127 bytes. The
result of the parsing error was to skip the OCSP check. It was therefore
possible for client certificates that should have been rejected (if the
OCSP check had been made) to be accepted.
Users not using OCSP checks are not affected by this vulnerability.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- - Upgrade to Apache Tomcat 1.2.16 or later
  Note: 1.2.15 was not released
        This version was included in Apache Tomcat 9.0.2 onwards, 8.5.24
        onwards, 8.0.48 onwards and 7.0.84 onwards.

Credit:
This issue was reported responsibly to the Apache Tomcat Security Team
by Jonas Klempel.

History:
2018-01-31 Original advisory

References:
[1] http://tomcat.apache.org/security-native.html

- --------------------------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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=IFA2
-----END PGP SIGNATURE-----

« Back to bulletins