Apache Struts security update fixes critical vulnerabilities

The vulnerabilities can allow attackers to execute rogue code on the server or redirect users to arbitrary locations

The Apache Software Foundation has released Struts 2.3.15.1, a security update for its popular Java Web application development framework that addresses two vulnerabilities, including a critical one that could allow remote attackers to execute arbitrary code on the server.

Struts version 2.3.15.1 has become the "General Availability" release, the designation for the project's highest quality version available to users.

The new release addresses two vulnerabilities that stem from issues in the implementation of the DefaultActionMapper class and its "action:", "redirect:" and "redirectAction:" prefixes in particular.

"In Struts 2 before 2.3.15.1 the information following 'action:', 'redirect:' or 'redirectAction:' is not properly sanitized," the Apache Struts developers said in an advisory. "Since said information will be evaluated as OGNL [Object Graph Navigation Language] expression against the value stack, this introduces the possibility to inject server side code."

Attackers can also manipulate the information following "redirect:" or "redirectAction:" in order to redirect users to an arbitrary location.

In order to fix these two vulnerabilities, the Apache Struts developers have added code that sanitizes the "action:"-prefixed information and have removed support for the "redirect:" and "redirectAction:" prefixes.

Applications that use the retired prefixes will no longer work properly after upgrading to Struts 2.3.15.1 or later versions. The Struts developers recommend replacing them in the code with fixed navigation rules.

The new Struts version also fixes a server path information leakage issue and adds improved input sanitizing for the file upload example.

"After a fileupload action, if the result jsp contains a <s:file> tag the value attribute is filled in with the server path where the file was saved," the developers said. "This discloses file system information about the server."

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags patch managementpatchesApache Software FoundationExploits / vulnerabilities

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.
Lucian Constantin

Lucian Constantin

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?