Apache Camel security advisory
CVE-2017-5643
Apache Camel's Validation Component is vulnerable against SSRF via remote DTDs and XXE
Description
The Validation Component of Apache Camel evaluates DTD headers of XML stream sources, although a validation against XML schemas (XSD) is executed. Remote attackers can use this feature to make Server-Side Request Forgery (SSRF) attacks by sending XML documents with remote DTDs URLs or XML External Entities (XXE). The vulnerability is not given for SAX or StAX sources.
Mitigation
2.17.x users should upgrade to 2.17.6, 2.18.x users should upgrade to 2.18.3.
Credit
This issue was discovered by Franz Forsthofer
Notes
The JIRA tickets https://issues.apache.org/jira/browse/CAMEL-10894 refers to the various commits that resolved the issue, and have more details.