CVE-2017-7672 Apache Struts Improper Input Validation vulnerability

What is CVE-2017-7672?

CVE-2017-7672 is a medium-severity denial of service vulnerability in Apache Struts, published on 13 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

If an application allows enter an 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. Solution is to upgrade to Apache Struts version 2.5.12.

Weakness: CWE-20

Which versions are affected by CVE-2017-7672?

2 open source packages ship an affected version, including org.apache.struts:struts2-core. It affects 1 product.

Products include Apache Struts.

How do I fix CVE-2017-7672?

Upgrade org.apache.struts:struts2-core to 2.5.12 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-7672 being exploited?

There is no known exploitation of CVE-2017-7672 in the wild and no public exploit code.

Other vulnerabilities in Apache Struts

• CVE-2020-17530 Apache Struts Remote Code Execution Exploited Critical 9.8
• CVE-2017-9791 Apache Struts 1 Improper Input Validation Exploited Critical 9.8
• CVE-2017-5638 Apache Struts Remote Code Execution Exploited Critical 9.8
• CVE-2012-0391 Apache Struts 2 Improper Input Validation Exploited Critical 9.8
• CVE-2018-11776 Apache Struts Remote Code Execution Exploited High 8.1

All Apache Struts vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9gp7-jvm2-r4mx.