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CVE-2023-6836: Improper Restriction of XML External Entity Reference

December 15, 2023 (updated December 19, 2023)

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.

References

  • github.com/advisories/GHSA-cr8h-fr86-8vfv
  • github.com/wso2/carbon-analytics-common/commit/9478336859306d3ea13b25cb386f29c183707fde
  • github.com/wso2/carbon-commons/commit/a08a587e3dd5146121a7b47a0fdd06ddbcd903f4
  • github.com/wso2/carbon-event-processing/commit/e9953afd46a45f704de341a081f710cbdfa3f975
  • github.com/wso2/carbon-governance/commit/ad36968d5a11d4fc35fa5cc4e8b5ae9a04e5bb4c
  • github.com/wso2/carbon-registry/commit/738b2a0b3e5f118527da236467ed72d9fd9ce40e
  • github.com/wso2/product-apim/commit/96e8f5d6566d57bbbb8d4257f6f55057a79d00b5
  • nvd.nist.gov/vuln/detail/CVE-2023-6836
  • security.docs.wso2.com/en/latest/security-announcements/security-advisories/2021/WSO2-2020-0716/

Code Behaviors & Features

Detect and mitigate CVE-2023-6836 with GitLab Dependency Scanning

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Affected versions

All versions before 2.2.12

Fixed versions

  • 2.2.12

Solution

Upgrade to version 2.2.12 or above.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-611: Improper Restriction of XML External Entity Reference
  • CWE-611: Improper Restriction of XML External Entity Reference

Source file

maven/org.wso2.carbon.event-processing/org.wso2.carbon.event.processor.core/CVE-2023-6836.yml

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