4.6

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2023-6836

CVE-2023-6836: WSO2 products vulnerable to XML External Entity attack

Multiple WSO2 products have been identified as vulnerable due to an XML External Entity (XXE) attack abuses a widely available but rarely used feature of XML parsers to access sensitive information.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2023-6836

CVE-2023-6836:

4.6

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.wso2.carbon.commons:org.wso2.carbon.ntask.core	maven	< 4.7.24	4.7.24
org.wso2.am:wso2am	maven	< 4.0.0-beta	4.0.0-beta
org.wso2.carbon.registry:org.wso2.carbon.registry.extensions	maven	< 4.7.31	4.7.31
org.wso2.carbon.event-processing:org.wso2.carbon.event.processor.core	maven	< 2.2.12	2.2.12
org.wso2.carbon.analytics-common:org.wso2.carbon.event.input.adapter.core	maven	< 5.2.23	5.2.23
org.wso2.carbon.governance:org.wso2.carbon.governance.common	maven	< 4.8.13	4.8.13

Technical Details

Vulnerability Intelligence
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Root Cause Analysis

The vulnerability stems from insecure XML parsing configurations across multiple components. The commit diffs show patches adding security measures like disabling external entities (IS_SUPPORTING_EXTERNAL_ENTITIES=false) and DTDs (SUPPORT_DTD=false) via XMLInputFactory, securing TransformerFactory with FEATURE_SECURE_PROCESSING, and implementing secure DocumentBuilderFactory configurations. The original vulnerable functions performed XML processing without these critical security settings, enabling XXE attacks. Each identified function corresponds to pre-patch code locations where these security properties were missing, as evidenced by the added security configurations in the patches.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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