Virtual Event: Threat Detection and Incident Response Summit - Watch Sessions
Connect with us

Hi, what are you looking for?



Many Internet-Exposed Servers Affected by Exploited Redis Vulnerability

Rapid7 security researchers have identified 2,000 internet-exposed Linux servers that appear to be impacted by a Redis vulnerability that has been exploited in attacks.

Rapid7 security researchers have identified 2,000 internet-exposed Linux servers that appear to be impacted by a Redis vulnerability that has been exploited in attacks.

Tracked as CVE-2022-0543, the security hole has a CVSS score of 10 and is described as an insufficient sanitization in Lua. While Redis statically links the Lua Library, some Debian/Ubuntu packages dynamically link it, leading to a sandbox escape that can be exploited to achieve remote code execution.

Both Debian and Ubuntu announced patches for the bug on February 18. On March 8, however, Brazilian security researcher Reginaldo Silva, who was credited for finding the issue, released proof-of-concept code targeting it.

In-the-wild exploitation of this vulnerability started days later, and the US Cybersecurity and Infrastructure Security Agency (CISA) added the flaw to its Known Exploited Vulnerabilities Catalog in late March.

Now, Rapid7 says a Metasploit module was made available on April 26 and warns that “attackers will continue to opportunistically exploit this vulnerability as long as there are internet facing targets to exploit.”

[ READ: Over 300,000 Internet-Exposed Databases Identified in 2021 ]

According to Rapid7, there are roughly 2,000 potentially exploitable targets out there, namely Ubuntu/Debian instances that have Redis configured in a dangerous, non-default state, and which are exposed to the internet.

Advertisement. Scroll to continue reading.

However, the researchers also note that there are roughly 33,000 Redis servers that allow unauthenticated access from the internet, along with others that are publicly accessible but require authentication.

“2,000 hosts is the absolute ceiling of potentially vulnerable internet-facing Redis servers that can be exploited without authentication. We actually aren’t certain how many of these hosts installed Redis using an affected package or if they’ve been patched,” Rapid7 notes.

The researchers believe some of these servers might be honeypots, but point out that, overall, the number of targets vulnerable to CVE-2022-0543 appears higher than initially anticipated.

“Given an exploit has been thrown around in the wild, it’s probably reasonable to bump the priority of fixing this vulnerability within your own organization,” Rapid7 concludes.

Related: Microsoft Warns of ‘Nimbuspwn’ Security Flaws Haunting Linux

Related: How Linux Became the New Bullseye for Bad Guys

Related: 8,000 Unprotected Redis Instances Accessible From Internet

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

SecurityWeek’s Threat Detection and Incident Response Summit brings together security practitioners from around the world to share war stories on breaches, APT attacks and threat intelligence.


Securityweek’s CISO Forum will address issues and challenges that are top of mind for today’s security leaders and what the future looks like as chief defenders of the enterprise.


Expert Insights

Related Content


Less than a week after announcing that it would suspended service indefinitely due to a conflict with an (at the time) unnamed security researcher...

Data Breaches

OpenAI has confirmed a ChatGPT data breach on the same day a security firm reported seeing the use of a component affected by an...

Risk Management

The supply chain threat is directly linked to attack surface management, but the supply chain must be known and understood before it can be...


The latest Chrome update brings patches for eight vulnerabilities, including seven reported by external researchers.


Patch Tuesday: Microsoft warns vulnerability (CVE-2023-23397) could lead to exploitation before an email is viewed in the Preview Pane.


Apple has released updates for macOS, iOS and Safari and they all include a WebKit patch for a zero-day vulnerability tracked as CVE-2023-23529.

IoT Security

A group of seven security researchers have discovered numerous vulnerabilities in vehicles from 16 car makers, including bugs that allowed them to control car...

Application Security

Drupal released updates that resolve four vulnerabilities in Drupal core and three plugins.