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.

The JIRA tickets https://issues.apache.org/jira/browse/CAMEL-10894 refers to the various commits that resolved the issue, and have more details.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-5643
• https://access.redhat.com/errata/RHSA-2017:1832
• GHSA-vq9j-jh62-5hmp
• https://lists.apache.org/thread.html/2318d7f7d87724d8716cd650c21b31cb06e4d34f6d0f5ee42f28fdaf@%3Ccommits.camel.apache.org%3E
• https://lists.apache.org/thread.html/b4014ea7c5830ca1fc28edd5cafedfe93ad4af2d9e69c961c5def31d@%3Ccommits.camel.apache.org%3E
• http://camel.apache.org/security-advisories.data/CVE-2017-5643.txt.asc?version=1&modificationDate=1489652454000&api=v2
• http://www.securityfocus.com/bid/97226
• apache/camel@2c6964a
• apache/camel@8afc5d1
• apache/camel@9f7376a
• https://issues.apache.org/jira/browse/CAMEL-10894