Feeds

Java devs warned of pushbutton exploit for buggy Struts framework

When they said you should upgrade, they meant it

3 Big data security analytics techniques

Java developers were warned, but they didn't listen. Security researchers at Trend Micro report that old and vulnerable versions of the Apache Struts framework for Java are still in widespread use, and now Chinese hackers are using automated tools to exploit their flaws.

The vulnerabilities in question were patched in the July Struts release, according to a blog post by Trend Micro senior threat researcher Noriaki Hayashi. But many applications are still running on older, buggy versions that can allow attackers to execute arbitrary code.

The exploits are made all the easier by a new tool developed by Chinese hackers, which makes executing certain commands on vulnerable remote servers as easy as pushing a button.

With a few simple clicks, attackers can determine the name of the current user account, display the version number of the OS, view network and system configuration information, list the contents of directories, and – particularly worryingly – add new user accounts.

The tool also reportedly includes a "WebShell" feature that makes it easy to plant a backdoor into vulnerable servers. Once this is done, the hackers can execute arbitrary commands from their keyboards using only a web browser.

Table showing commands that can be executed remotely on vulnerable Struts servers

Here's what attackers can do on your Struts server using a Chinese script-kiddie tool

The attack works on servers running either Windows or Linux, although the actual commands that can be executed will differ depending on the OS.

Trend Micro is hardly the first company to warn developers of vulnerabilities in open source frameworks and the dangers of running old versions. In March, a study by Sonatype and Aspect Security found that developers downloaded out-of-date versions of the most popular frameworks 33 per cent of the time, even though newer versions with security fixes were available.

Among the top Java frameworks, Struts is also a particular target for malicious hackers. A January report by CAST found that applications built using Struts were highly likely to be misconfigured, and they delivered the lowest code quality scores overall.

Of course, the tendency to stick with outdated versions of Java frameworks is somewhat understandable. Frameworks like Struts often power highly complex, mission-critical applications that require rigorous testing before any changes can be deployed.

Security patches can also sometimes break apps when vulnerable features are removed. But with flaws as severe as the ones now being exploited in Struts, it's essential that Java development shops stay on the ball and migrate to secure versions ASAP.

In this case, blocking the Chinese automated exploit tool requires an upgrade to Struts 2.13.15.1 – which was released in July – or to any later version. ®

3 Big data security analytics techniques

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
Heartbleed exploit, inoculation, both released
File under 'this is going to hurt you more than it hurts me'
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.