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AUSCERT External Security Bulletin Redistribution
ESB-2014.0828
A number of vulnerabilities have been identified in Apache Tomcat
28 May 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Apache Tomcat
Publisher: The Apache Software Foundation
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-0119 CVE-2014-0097 CVE-2014-0096
CVE-2014-0095 CVE-2014-0075
Original Bulletin:
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-7.html
http://tomcat.apache.org/security-8.html
Comment: This bulletin contains five (5) The Apache Software Foundation
security advisories.
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CVE-2014-0075 Denial of Service
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- - Apache Tomcat 8.0.0-RC1 to 8.0.3
- - Apache Tomcat 7.0.0 to 7.0.52
- - Apache Tomcat 6.0.0 to 6.0.39
Description:
It was possible to craft a malformed chunk size as part of a chucked
request that enabled an unlimited amount of data to be streamed to the
server, bypassing the various size limits enforced on a request. This
enabled a denial of service attack.
Mitigation:
Users of affected versions should apply one of the following mitigations
- - Upgrade to Apache Tomcat 8.0.5 or later
(8.0.4 contains the fix but was not released)
- - Upgrade to Apache Tomcat 7.0.53 or later
- - Upgrade to Apache Tomcat 6.0.41 or later
(6.0.40 contains the fix but was not released)
Credit:
This issue was reported to the Tomcat security team by David Jorm of the
Red Hat Security Response 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
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CVE-2014-0095 Denial of Service
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- - Apache Tomcat 8.0.0-RC2 to 8.0.3
Description:
A regression was introduced in revision 1519838 that caused AJP
requests to hang if an explicit content length of zero was set on the
request. The hanging request consumed a request processing thread which
could lead to a denial of service.
Mitigation:
Users of affected versions should apply one of the following mitigations
- - Upgrade to Apache Tomcat 8.0.5 or later
(8.0.4 contains the fix but was not released)
Credit:
This issue was reported as a possible bug via the Tomcat users mailing
list and the security implications were identified by theTomcat security
team.
References:
[1] http://tomcat.apache.org/security-8.html
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CVE-2014-0096 Information Disclosure
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- - Apache Tomcat 8.0.0-RC1 to 8.0.3
- - Apache Tomcat 7.0.0 to 7.0.52
- - Apache Tomcat 6.0.0 to 6.0.39
Description:
The default servlet allows web applications to define (at multiple
levels) an XSLT to be used to format a directory listing. When running
under a security manager, the processing of these was not subject to the
same constraints as the web application. This enabled a malicious web
application to bypass the file access constraints imposed by the
security manager via the use of external XML entities.
Mitigation:
Users of affected versions should apply one of the following mitigations
- - Upgrade to Apache Tomcat 8.0.5 or later
(8.0.4 contains the fix but was not released)
- - Upgrade to Apache Tomcat 7.0.53 or later
- - Upgrade to Apache Tomcat 6.0.41 or later
(6.0.40 contains the fix but was not released)
Credit:
This issue was identified by the 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
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CVE-2014-0097 Information Disclosure
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- - Apache Tomcat 8.0.0-RC1 to 8.0.3
- - Apache Tomcat 7.0.0 to 7.0.52
- - Apache Tomcat 6.0.0 to 6.0.39
Description:
The code used to parse the request content length header did not check
for overflow in the result. This exposed a request smuggling
vulnerability when Tomcat was located behind a reverse proxy that
correctly processed the content length header.
Mitigation:
Users of affected versions should apply one of the following mitigations
- - Upgrade to Apache Tomcat 8.0.5 or later
(8.0.4 contains the fix but was not released)
- - Upgrade to Apache Tomcat 7.0.53 or later
- - Upgrade to Apache Tomcat 6.0.41 or later
(6.0.40 contains the fix but was not released)
Credit:
A test case that demonstrated the parsing bug was sent to the Tomcat
security team but no context was provided. The security implications
were identified by the 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
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CVE-2014-0119 Information Disclosure
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- - Apache Tomcat 8.0.0-RC1 to 8.0.5
- - Apache Tomcat 7.0.0 to 7.0.53
- - Apache Tomcat 6.0.0 to 6.0.39
Description:
In limited circumstances it was possible for a malicious web application
to replace the XML parsers used by Tomcat to process XSLTs for the
default servlet, JSP documents, tag library descriptors (TLDs) and tag
plugin configuration files. The injected XMl parser(s) could then bypass
the limits imposed on XML external entities and/or have visibility of
the XML files processed for other web applications deployed on the same
Tomcat instance.
Mitigation:
Users of affected versions should apply one of the following mitigations
- - Upgrade to Apache Tomcat 8.0.8 or later
(8.0.6 and 8.0.7 contain the fix but were not released)
- - Upgrade to Apache Tomcat 7.0.54 or later
- - Upgrade to Apache Tomcat 6.0.41 or later
(6.0.40 contains the fix but was not released)
Credit:
This issue was identified by the 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
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