Apache Struts is a free and open-source framework used to build Java web applications.This is not the first remote code execution vulnerability discovered on Apache Struts.

Apache Struts2 official released a security bulletin, the bulletin pointed out that Apache Struts2 Jakarta Multipart parser plug-in, there is a remote code execution vulnerability, vulnerability number CVE-2017-5638.

An attacker could use the plugin to upload a file by modifying the value of the Content-Length header and adding the malicious code to the Content-Disposition value, causing the Remote Code Execution.

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More Information:

This specific vulnerability can be exploited if the attacker sends a crafted request to transfer a file to a vulnerable server that uses a Jakarta-based module to handle the request.

Security experts also examine malicious attack will turn off the firewall on the objective servers and after that drop malicious payloads, for example, IRC bouncers and DDoS bots.

From Imperva security, this attack depends on Manipulating header type, we can detect and block the attack before it was mace public by using “Unauthorized Request Content Type” rule.

A proof of concept that shows the attack situation is openly accessible.The attacks originated from 1,323 IP addresses over 40 distinct nations.

Vulnerable Versions and Mitigation

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