CVE-2017-9787 Spring AOP functionality (Struts) vulnerable to DoS attack

What is CVE-2017-9787?

CVE-2017-9787 is a high-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

When using a Spring AOP functionality to secure Struts actions it is possible to perform a DoS attack. Solution is to upgrade to Apache Struts version 2.5.12 or 2.3.33.

Which versions are affected by CVE-2017-9787?

4 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-2017-9787?

Upgrade org.apache.struts:struts2-core to a fixed version for your release line: 2.3.33 or 2.5.12.

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-2017-9787 being exploited?

There is no known exploitation of CVE-2017-9787 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-8mr5-h28g-36qx.