Apache Camel: Camel-XPath XML External Entity Processing and File Disclosure via the documentType=InputSource Option
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Apache Software Foundation | Apache Camel | unaffected |
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Configuration 1 [-]
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No data.
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| Apache | Apache Camel |
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| Apache | Camel |
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Vendor Solution
Upgrade to Apache Camel 4.23.0, which fixes the issue. Users on the 4.18.x LTS releases stream should upgrade to 4.18.5. Users on the 4.22.x LTS releases stream should upgrade to 4.22.1. The InputSource document type now goes through the same hardened parser as the default type, so a DOCTYPE is refused. Note that it also shares that type's documented escape hatch: the same DocumentBuilderFactory system properties that relax the default type relax this one, so a deployment that has set them remains unprotected by design.
Vendor Workaround
For deployments that cannot upgrade immediately, do not use documentType=InputSource on expressions evaluated over untrusted XML; the default document type already refuses a DOCTYPE.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.703% probability within 30 days)
| Type | Values Removed | Values Added |
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| CPEs | cpe:2.3:a:apache:camel:*:*:*:*:*:*:*:* |
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threat_severity
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threat_severity
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| First Time appeared |
Apache
Apache apache Camel Apache camel |
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| Vendors & Products |
Apache
Apache apache Camel Apache camel |
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ssvc
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| Description | Improper Restriction of XML External Entity Reference vulnerability in Apache Camel XPath component. This issue affects Apache Camel: from 4.0.0 before 4.18.5, from 4.19.0 before 4.22.1. With documentType set to InputSource, XPathBuilder handed the payload straight to javax.xml.xpath, which builds a DocumentBuilder of its own using the JDK defaults. The hardening applied to Camel's default document type was therefore bypassed: a DOCTYPE declaration that is refused on the default type was accepted here, and the external entity it declared was resolved and expanded into the evaluated document. An external sender whose XML reaches such an expression could read files readable by the Camel process and cause the process to issue requests to hosts it names. The two document types disagreeing on parser configuration is what made this reachable, since a deployment choosing InputSource for streaming reasons had no indication it was also choosing a weaker parser. Upgrade to Apache Camel 4.23.0, which fixes the issue. Users on the 4.18.x LTS releases stream should upgrade to 4.18.5. Users on the 4.22.x LTS releases stream should upgrade to 4.22.1. The InputSource document type now goes through the same hardened parser as the default type, so a DOCTYPE is refused. Note that it also shares that type's documented escape hatch: the same DocumentBuilderFactory system properties that relax the default type relax this one, so a deployment that has set them remains unprotected by design. For deployments that cannot upgrade immediately, do not use documentType=InputSource on expressions evaluated over untrusted XML; the default document type already refuses a DOCTYPE. | |
| Title | Apache Camel: Camel-XPath XML External Entity Processing and File Disclosure via the documentType=InputSource Option | |
| Weaknesses | CWE-611 | |
| References |
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| Metrics |
cvssV3_1
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