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CVE-2014-0003: Apache Camel critical disclosure vulnerability

Severity: Critical

Vendor: The Apache Software Foundation

Versions Affected: Camel 2.11.0 to 2.11.3, Camel 2.12.0 to 2.12.2
The unsupported Camel 2.3.x, 2.4.x, 2.5.x, 2.6.x, 2.7.x, 2.8.x, 2.9.x and 2.10.x versions may be also affected.

Description: The Apache Camel XSLT component allows XSL stylesheets to perform calls to external Java methods. A remote attacker able to submit messages to an xslt Camel route could use this flaw to perform arbitrary remote code execution in the context of the Camel server process.

Mitigation: 2.11.x users should upgrade to 2.11.4, 2.12.x users should upgrade to 2.12.3. This patch will be included from Camel 2.13.0: https://git-wip-us.apache.org/repos/asf?p=camel.git;a=commitdiff;h=e922f89290f236f3107039de61af0375826bd96d

Example: Create a simple route which receives an HTTP request, apply a (safe) stylesheet and store the result in a file:
<route>
  <from uri="servlet:///hello"/>
  <to uri="xslt:file:/tmp/transform.xsl" />
  <to uri="file:/tmp/output" />
</route>

If an attacker is able to submit a message to this route, they can change the XSLT stylesheet to use for this transfiormation. This stylesheet could be provided by a valid URL and could perform arbitrary remote code execution.

Credit: This issue was discovered by David Jorm.

References: http://camel.apache.org/security-advisories.html
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