Apache CXF < 2.5.10/2.6.7/2.7.4 - Denial of Service
SEC Consult Vulnerability Lab Security Advisory < 20130709-0 > ======================================================================= title: Denial of service vulnerability product: Apache CXF vulnerable version: Apache CXF prior to 2.5.10, 2.6.7 and 2.7.4 fixed version: Apache CXF 2.5.10, 2.6.7 and 2.7.4 onwards CVE number: CVE-2013-2160 impact: Critical homepage: http://cxf.apache.org/ found: 2013-02-01 by: Andreas Falkenberg, SEC Consult Vulnerability Lab Christian Mainka, Ruhr-University Bochum Juraj Somorovsky, Ruhr-University Bochum Joerg Schwenk, Ruhr-University Bochum https://www.sec-consult.com ======================================================================= Vendor/product description: ------------------------------------------------------------------------------ "Apache CXF is an open source services framework. CXF helps you build and develop services using frontend programming APIs, like JAX-WS and JAX-RS. These services can speak a variety of protocols such as SOAP, XML/HTTP, RESTful HTTP, or CORBA and work over a variety of transports such as HTTP, JMS or JBI." URL: http://cxf.apache.org/ Business recommendation: ------------------------------------------------------------------------------ Various denial of service attack vectors were found within Apache CXF. The recommendation of SEC Consult is to immediately perform an update. Vulnerability overview/description: ------------------------------------------------------------------------------ It is possible to execute Denial of Service attacks on Apache CXF, exploiting the fact that the streaming XML parser does not put limits on things like the number of elements, number of attributes, the nested structure of the document received, etc. The effects of these attacks can vary from causing high CPU usage, to causing the JVM to run out of memory. URL: http://cxf.apache.org/security-advisories.data/CVE-2013-2160.txt.asc Proof of concept: ------------------------------------------------------------------------------ The following SOAP message will trigger a denial of service: <?xml version="1.0"?> <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope";> <soap:Body> <element> <element> <element> <element> [thousands more] </element> </element> </element> </element> </soap:Body> </soap:Envelope> There are various other XML payloads that will also trigger a denial of service on vulnerable services. Vulnerable / tested versions: ------------------------------------------------------------------------------ This vulnerability affects all versions of Apache CXF prior to 2.5.10, 2.6.7 and 2.7.4. Vendor contact timeline: ------------------------------------------------------------------------------ 2013-02-22: Advisory sent to vendor by Juraj Somorovsky (RUB) 2013-02-22: Advisory acknowledged by vendor 2013-04-19: Vendor confirms vulnerability 2013-05-15: Vendor publishes fixed version 2013-06-27: Vulnerability is disclosed by vendor 2013-07-09: SEC Consult releases security advisory Solution: ------------------------------------------------------------------------------ CXF 2.5.x users should upgrade to 2.5.10 or later as soon as possible. CXF 2.6.x users should upgrade to 2.6.7 or later as soon as possible. CXF 2.7.x users should upgrade to 2.7.4 or later as soon as possible. Also see the advisory of the vendor: http://cxf.apache.org/security-advisories.data/CVE-2013-2160.txt.asc Workaround: ------------------------------------------------------------------------------ No workaround available. Advisory URL: ------------------------------------------------------------------------------ https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult Vienna - Bangkok - Frankfurt/Main - Montreal - Singapore - Vilnius Headquarter: Mooslackengasse 17, 1190 Vienna, Austria Phone: +43 1 8903043 0 Fax: +43 1 8903043 15 Mail: research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF Andreas Falkenberg / @2013 |