Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

Tenable Blog

Subscribe

Spring4Shell (CVE-2022-22965) FAQ: Spring Framework Remote Code Execution Vulnerability

A list of frequently asked questions related to Spring4Shell (CVE-2022-22965).

Update April 13: Updated the Identifying affected systems section with the recent addition of a remote direct check plugin for Spring4Shell. For information about our detections, please refer to this post on the Tenable Community.

Update April 1: Added sections about Apache Tomcat and Tenable Products. The Identifying affected systems section has been updated with additional information on Tenable product coverage.

Update March 31: Additional details have been provided including fixed versions, the CVE identifier, additional details on the requirements necessary to exploit the vulnerability, as well as details on Tenable product coverage.

Tenable Research is closely monitoring updates related to Spring4Shell. As more information becomes available, we will update this FAQ with additional details about the vulnerability, including Tenable product coverage.

Frequently Asked Questions about Spring4Shell

What is Spring4Shell?

Spring4Shell is the nickname given to a zero-day vulnerability in the Spring Core Framework, a programming and configuration model for Java-based enterprise applications.

Has a CVE been assigned to this vulnerability?

CVE-2022-22965 has been assigned to this vulnerability.

Is Spring4Shell related to Log4Shell?

While the name itself was inspired by Log4Shell (CVE-2021-44228), the two are not related.

Is there a patch available for Spring4Shell?

As of March 31, Spring Framework versions 5.3.18 and 5.2.20 have been released. According to the vulnerability announcement from Spring, Spring Boot version 2.6.6 and 2.5.12 (both depend on Spring Framework 5.3.18) have been released.

How severe is Spring4Shell?

An attacker could exploit Spring4Shell by sending a specially crafted request to a vulnerable server. However, exploitation of Spring4Shell requires certain prerequisites, whereas the original Log4Shell vulnerability affected all versions of Log4j 2 using the default configuration.

According to Spring, the following requirements were included in the vulnerability report, however the post cautions that there may be other ways in which this can be exploited so this may not be a complete list of requirements at this time:

  • Java Development Kit (JDK) 9 or greater
  • Apache Tomcat as the Servlet container
  • Packaged as a WAR
  • spring-webmvc or spring-webflux dependency
What versions of Spring Core Framework are affected?

As of March 31, Spring versions 5.3.18 and 5.2.20 have been released to address CVE-2022-22965. While it’s not explicitly noted what versions are impacted at the time this blog was updated, we hope to have more clarity soon and will update this post with additional information.

Is my application vulnerable if I use a JDK 9+ and Spring Framework?

Using both JDK 9+ and Spring Framework together does not necessarily equate to being vulnerable to Spring4Shell, as the application would need to be configured in a way for an attacker to exploit the flaw. For instance, Spring has recommended developers specify the allowedFields property when using the DataBinder class. Researchers have confirmed that not specifying this property could enable an attacker to leverage Spring4Shell against a vulnerable application.

What does Spring4Shell have to do with CVE-2010-1622?

Researchers at Praetorian have confirmed that Spring4Shell is a patch bypass of CVE-2010-1622, a code injection vulnerability in the Spring Core Framework that was reportedly fixed nearly 12 years ago. However, the researchers say the fix for CVE-2010-1622 was incomplete and a new path to exploit this legacy flaw exists.

Is Spring4Shell related to CVE-2022-22963?

No, these are two completely unrelated vulnerabilities. CVE-2022-22963 is a vulnerability in the Spring Cloud Function, a serverless framework for implementing business logic via functions. An advisory for CVE-2022-22963 was published on March 29 and patches for Spring Cloud Function are available.

Because there was no CVE assigned for Spring4Shell at the time of its disclosure, Spring4Shell was erroneously associated with CVE-2022-22963.

Is Proof of Concept exploit code available?

Yes, there are multiple working proof-of-concept (PoC) exploits available for both Spring4Shell and CVE-2022-22963.

Are Tenable products affected by Spring4Shell or CVE-2022-22963?

Based on current information as of 4/1/2022 regarding Spring4Shell (CVE-2022-22965) and CVE-2022-22963, Tenable products are not affected.

Apache Tomcat is listed as a prerequisite, has the Tomcat team released patches?

Yes, they have. While CVE-2022-22965 resides in the Spring Framework, the Apache Tomcat team released new versions of Tomcat to ”close the attack vector on Tomcat’s side.” This is especially useful in instances where an unsupported version of the Spring Framework is in use alongside Tomcat.

Does Tenable have any product coverage for Spring4Shell?

Yes, please refer to the Identifying affected systems section below for details. If you would like to learn more about the plugins, please refer to this post on the Tenable Community.

Identifying affected systems

A list of Tenable plugins to identify this vulnerability can be found here.

Plugin ID Name Products Requirements
159374 Spring Framework < 5.2.20 / 5.3.x < 5.3.18 Remote Code Execution (CVE-2022-22965) Tenable.io, Tenable.sc, Nessus Paranoid Mode, Thorough Tests
159542 Spring Framework Spring4Shell (CVE-2022-22965) Tenable.io, Tenable.sc, Nessus Test embedded web servers
113217 Spring Framework < 5.2.20 / 5.3.x < 5.3.18 Remote Code Execution (Spring4Shell) Web Application Scanning None
98097 Backdoor Detection Web Application Scanning None
159462 Apache Tomcat 8.x < 8.5.78 Spring4Shell (CVE-2022-22965) Mitigations Tenable.io, Tenable.sc, Nessus None
159464 Apache Tomcat 9.x < 9.0.62 Spring4Shell (CVE-2022-22965) Mitigations Tenable.io, Tenable.sc, Nessus None
159463 Apache Tomcat 10.x < 10.0.20 Spring4Shell (CVE-2022-22965) Mitigations Tenable.io, Tenable.sc, Nessus None

For Web Application Scanning customers, we've updated our Backdoor Detection plugin to detect the tomcatwar.jsp shell file. The backdoor detection script can be used to identify a web backdoor or web shell on a web server as a result of an attacker exploiting the vulnerability.

Paranoid and Thorough Tests requirements for Plugin ID 159374

For Nessus plugin ID 159374, "Spring Framework < 5.2.20 / 5.3.x < 5.3.18 Remote Code Execution (CVE-2022-22965)," users are required to enable the "Show potential false alarms" setting, also known as paranoid mode, in their scan policy in order to enable this plugin in a scan. In addition, the "Perform thorough tests" setting must be enabled as well.

We also recommend enabling only this specific plugin in a paranoid scan. Scan policies configured to have all plugins enabled will see an increase in the number of triggers, as it will include all paranoid plugins during the scan.

Enabling Paranoid and Thorough Tests Modes

To enable this setting for Nessus and Tenable.io users:

  • Click Assessment > General > Accuracy
  • Enable the "Show potential false alarms" option
  • Enable the "Perform thorough tests (may disrupt your network or impact scan speed)" option

To enable this setting for Tenable.sc (formerly SecurityCenter) users:

  • Click Assessment > Accuracy
  • Click the drop-down box and select "Paranoid (more false alarms)"
  • Click the drop-down box and select "Perform thorough tests (may disrupt your network or impact scan speed)"

Join Tenable's Security Response Team on the Tenable Community.

Learn more about Tenable, the first Cyber Exposure platform for holistic management of your modern attack surface.

Get a free 30-day trial of Tenable.io Vulnerability Management.

Related Articles

Are You Vulnerable to the Latest Exploits?

Enter your email to receive the latest cyber exposure alerts in your inbox.

tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable.io Vulnerability Management trial also includes Tenable Lumin, Tenable.io Web Application Scanning and Tenable.cs Cloud Security.

tenable.io BUY

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

65 assets

Choose Your Subscription Option:

Buy Now

Try Nessus Professional Free

FREE FOR 7 DAYS

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy Nessus Professional

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, community and chat support 24 hours a day, 365 days a year.

Select Your License

Buy a multi-year license and save.

Add Support and Training

Tenable.io

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable.io Vulnerability Management trial also includes Tenable Lumin, Tenable.io Web Application Scanning and Tenable.cs Cloud Security.

Tenable.io BUY

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

65 assets

Choose Your Subscription Option:

Buy Now

Try Tenable.io Web Application Scanning

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable.io platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Your Tenable Web Application Scanning trial also includes Tenable.io Vulnerability Management, Tenable Lumin and Tenable.cs Cloud Security.

Buy Tenable.io Web Application Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs

$3,578

Buy Now

Try Tenable.io Container Security

Enjoy full access to the only container security offering integrated into a vulnerability management platform. Monitor container images for vulnerabilities, malware and policy violations. Integrate with continuous integration and continuous deployment (CI/CD) systems to support DevOps practices, strengthen security and support enterprise policy compliance.

Buy Tenable.io Container Security

Tenable.io Container Security seamlessly and securely enables DevOps processes by providing visibility into the security of container images – including vulnerabilities, malware and policy violations – through integration with the build process.

Try Tenable Lumin

Visualize and explore your Cyber Exposure, track risk reduction over time and benchmark against your peers with Tenable Lumin.

Your Tenable Lumin trial also includes Tenable.io Vulnerability Management, Tenable.io Web Application Scanning and Tenable.cs Cloud Security.

Buy Tenable Lumin

Contact a Sales Representative to see how Lumin can help you gain insight across your entire organization and manage cyber risk.

Try Tenable.cs

Enjoy full access to detect and fix cloud infrastructure misconfigurations and view runtime vulnerabilities. Sign up for your free trial now.

Your Tenable.cs Cloud Security trial also includes Tenable.io Vulnerability Management, Tenable Lumin and Tenable.io Web Application Scanning.

Contact a Sales Rep to Buy Tenable.cs

Contact a Sales Representative to learn more about Tenable.cs Cloud Security and see how easy it is to onboard your cloud accounts and get visibility into both cloud misconfigurations and vulnerabilities within minutes.

Try Nessus Expert Free

FREE FOR 7 DAYS

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Already have Nessus Professional?
Upgrade to Nessus Expert free for 7 days.

Buy Nessus Expert

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Select Your License

Promotional pricing extended until December 31st.
Buy a multi-year license and save more.

Add Support and Training