Security Experts:

Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Cybercrime

Hackers Start Exploiting Drupalgeddon2 Vulnerability

Attempts to exploit a recently patched vulnerability in the Drupal content management system (CMS) were spotted by researchers shortly after someone published a proof-of-concept (PoC) exploit.

Attempts to exploit a recently patched vulnerability in the Drupal content management system (CMS) were spotted by researchers shortly after someone published a proof-of-concept (PoC) exploit.

In late March, Drupal developers rolled out an update to address CVE-2018-7600, a highly critical remote code execution flaw that can be exploited to take full control of a site. The security hole affects Drupal 6, 7 and 8, and patches have been released for each of the impacted versions – Drupal 6 is no longer supported since February 2016, but a patch has still been created.

Drupalgeddon2

Experts warned at the time that exploitation of the vulnerability, dubbed Drupalgeddon2, was imminent. However, it took roughly two weeks for a proof-of-concept (PoC) exploit to become publicly available.

Researchers at Check Point and Drupal experts at Dofinity worked together to uncover the vulnerability and on Thursday they published a detailed technical analysis.

“In brief, Drupal had insufficient input sanitation on Form API (FAPI) AJAX requests,” they explained in a post on the Check Point blog. “As a result, this enabled an attacker to potentially inject a malicious payload into the internal form structure. This would have caused Drupal to execute it without user authentication. By exploiting this vulnerability an attacker would have been able to carry out a full site takeover of any Drupal customer.”

Shortly after Check Point and Dofinity published their analysis, Vitalii Rudnykh published a PoC on GitHub for “educational or information purposes,” which others confirmed to be functional. Once the PoC was made public, Sucuri and the SANS Internet Storm Center started seeing attempts to exploit Drupalgeddon2.

At the time of writing, there are no reports of websites being hacked via CVE-2018-7600. Attackers are apparently scanning the web in search for vulnerable servers. The payloads spotted by SANS researchers use simple commands such as echo, phpinfo, whoami and touch.

Web security services, including Cloudflare’s Web Application Firewall (WAF), should be able to block attacks exploiting the vulnerability.

“The exploit attempts are currently arriving at a pretty brisk pace,” said ISC handler Kevin Liston. Sucuri founder and CTO Daniel Cid also warned that the number of exploit attempts is expected to grow.

The original Drupalgeddon vulnerability, disclosed in October 2014, was first exploited just 7 hours after a patch was released and it was leveraged by cybercriminals for at least another two years.

Related: Flaw in Drupal Module Exposes 120,000 Sites to Attacks

Related: Several Vulnerabilities Patched in Drupal

Written By

Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Expert Insights

Related Content

Cybercrime

Zendesk is informing customers about a data breach that started with an SMS phishing campaign targeting the company’s employees.

Cybercrime

The release of OpenAI’s ChatGPT in late 2022 has demonstrated the potential of AI for both good and bad.

Cybercrime

A new study by McAfee and the Center for Strategic and International Studies (CSIS) named a staggering figure as the true annual cost of...

Mobile & Wireless

Technical details published for an Arm Mali GPU flaw leading to arbitrary kernel code execution and root on Pixel 6.

Mobile & Wireless

Apple rolled out iOS 16.3 and macOS Ventura 13.2 to cover serious security vulnerabilities.

Cloud Security

VMware vRealize Log Insight vulnerability allows an unauthenticated attacker to take full control of a target system.

Mobile & Wireless

Apple’s iOS 12.5.7 update patches CVE-2022-42856, an actively exploited vulnerability, in old iPhones and iPads.

Cybercrime

The FBI dismantled the network of the prolific Hive ransomware gang and seized infrastructure in Los Angeles that was used for the operation.