CVE-2023-41835 Apache Struts: excessive disk usage

What is CVE-2023-41835?

CVE-2023-41835 is a high-severity denial of service vulnerability in Apache Struts, published on 5 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When a Multipart request is performed but some of the fields exceed the maxStringLength  limit, the upload files will remain in struts.multipart.saveDir  even if the request has been denied. Users are recommended to upgrade to versions Struts 2.5.32 or 6.1.2.2 or Struts 6.3.0.1 or greater, which fixe this issue.

Weakness: CWE-459

Which versions are affected by CVE-2023-41835?

6 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-2023-41835?

Upgrade org.apache.struts:struts2-core to a fixed version for your release line: 2.5.32, 6.1.2.2 or 6.3.0.1.

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-2023-41835 being exploited?

There is no known exploitation of CVE-2023-41835 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-729q-fcgp-r5xh.