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CVE-2017-9804

7.5 · HIGH

In Apache Struts 2.3.7 through 2.3.33 and 2.5 through 2.5.12, if an application allows entering a URL in a form field and built-in URLValidator is used, it is possible to prepare a special URL whic…

Published Sep 20, 2017CWE-20EPSS 8.24%

Overview

CVE-2017-9804 is a high-severity vulnerability. It was published on September 20, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In Apache Struts 2.3.7 through 2.3.33 and 2.5 through 2.5.12, if an application allows entering a URL in a form field and built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when performing validation of the URL. NOTE: this vulnerability exists because of an incomplete fix for S2-047 / CVE-2017-7672.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.arubanetworks.com/assets/alert/ARUBA-PSA-2017-003.txtRefwww.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlRefwww.securityfocus.com/bid/100612Refwww.securitytracker.com/id/1039261Refsecurity.netapp.com/advisory/ntap-20180629-0001/Refstruts.apache.org/docs/s2-050.htmlReftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170907-struts2Refwww.arubanetworks.com/assets/alert/ARUBA-PSA-2017-003.txtRefwww.oracle.com/technetwork/security-advisory/alert-cve-2017-9805-3889403.htmlRefwww.securityfocus.com/bid/100612

How CyberStrike helps

Frequently asked questions

What is CVE-2017-9804?

CVE-2017-9804 is a high-severity vulnerability. It was published on September 20, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2017-9804?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-9804?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-9804?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-9804 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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