Important Vulnerability on Advanced Custom Fields Plugin for WordPress

8 Jun, 2020 new Black Hashes DB for Imunify products were released.

Release details:

       UUID: 0d09db4d-8610-4a74-b026-1934bb1e9854

       Date: 2020-06-08 

By this update legitimate WordPress file wp-blog-header.php was rated as malicious with verdict SMW-BLKH-46666-auto which caused False Positive alerts.

 

What are the issues?

 

In some cases, users of Imunify360 v4.7 can experience issues with IMAP authorization performance. These issues are related to the amount of UDP traffic produced when Imunify360 protects a server against brute force mail attacks. 

Web spam, phishing links, commercial comments, and other unwelcome additions to web pages is a big headache for many webmasters and blog owners. It seems to flow unceasingly to site users, and countermeasures such as comment approval, registration confirmation, and CAPTCHAs are inconvenient for admins and users alike. 

At 11am EST on Friday 29 May, we’ll be conducting a live webinar on the new features and updates of Imunify360. Sign up and join the conversation on what’s new with our automated server protection suite.

The webinar recording is now available. You could watch it here.

 

Web sites running WordPress are like catnip for hackers. Among the millions of WordPress users are many with weak login credentials, which are exploited to launch malware campaigns. 

Many such campaigns have been launched recently, and we at Imunify360 have discovered another one. We first detected it on 13 April, and since then we’ve seen it blocked by Imunify over 300,000 times. In the past month, this campaign has compromised thousands of unprotected WordPress-based web sites. 

Let’s analyze this new WordPress malware campaign to see what makes it dangerous to web sites running WordPress. Additionally, check our WordPress Security Ultimate Guide for 2021 to learn more about WordPress Security.

Last week the Imunify360 Operations Team spotted some malware embedded in a WordPress plugin. On Thursday, they reported it to the WordPress Plugin Review Team, who closed that plugin the very next day. 

We’d like to share with you what our Operations Team saw, so you know more about how malicious plugins work, and how you can avoid them. Additionally, read our website hosting security article and learn how to keep your website secure in 2021.

We at Imunify Security are excited to announce that the new version of cPanel & WHM, version 88, bundles ImunifyAV as its default antivirus solution.

ImunifyAV is Linux server antivirus provided free of charge. It features a highly efficient malware detection engine that finds most types of malware without stressing your system. With the ImunifyAV+ premium edition of antivirus for linux server, malware is easy to remove with just one click. 

 

This week, the Imunify360 security team was informed of a new kind of attack, one that our customers told us caused these problems:

• Inoperable firewall
• High CPU resource consumption
• Log entries such as: im360.plugins.client360: Cannot connect the Server (imunify360.cloudlinux.com) [[Errno -2] Name or service not known]

When we investigated, we saw that these issues were caused by a SaltStack authorization bypass vulnerability (CVE References: CVE-2020-11651, CVE-2020-11652). This vulnerability enables remote command execution as root, on both the master and all minions that connect to it. It affects SaltStack Salt before 2019.2.4, and 3000 before 3000.2.

 

If you’re running Imunify360 on your servers, you should enable real-time scanning. Why and how should you do that? Find out below. 

 

WP-VCD is a hacking campaign that’s responsible for the vast majority of WordPress malware infections. It has launched massive campaigns that have been very effective. Conducted on weekends, when many security staff are off the job, its campaigns have infected around two million WordPress sites.