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CVE-2024-6387: New OpenSSH RegreSSHion Vulnerability Gives Hackers Root Access on Linux Servers - 700,000+ Linux Boxes Potentially at Risk

Labeled as CVE-2024-6387, the recently discovered vulnerability in OpenSSH has become a serious cause for concern among Linux servers. OpenSSH is a collection of networking tools built on the Secure Shell (SSH) protocol. It is widely utilized to secure remote logins, manage and administer remote servers, and transfer files through SCP and SFTP. Nicknamed as the “RegreSSHion Bug”, Researchers at Qualys initially identified the vulnerability in May 2024.

CVE-2024-6387 - Shields Up Against RegreSSHion

On July 1st, the Qualys’s security team announced CVE-2024-6387, a remotely exploitable vulnerability in the OpenSSH server. This critical vulnerability is nicknamed “regreSSHion” because the root cause is an accidental removal of code that fixed a much earlier vulnerability CVE-2006-5051 back in 2006. The race condition affects the default configuration of sshd (the daemon program for SSH).

CVE-2024-6387 OpenSSH RCE vulnerability ("regreSSHion") - Cato Networks impact and analysis

TL; DR – Multiple versions of OpenSSH are vulnerable to remote code execution. There is no working public PoC, and researchers have only been able to exploit the vulnerability under unique lab conditions. Cato Sockets by default do NOT have a publicly exposed SSH interface, it is always recommended to keep Cato Sockets LAN interface exposed only internally and use comprehensive network access controls to manage SSH access.

Deep Dive into Blockchain Security: Vulnerabilities and Protective Measures

Blockchain technology, renowned for its decentralized and immutable nature, promises enhanced security for various applications. However, like any technology, it is not without vulnerabilities. This in-depth examination explores the security aspects of blockchain, identifies common vulnerabilities, and outlines the measures needed to secure blockchain applications effectively.

Security Update: Critical CUPS Vulnerability

A critical chained vulnerability (CVE-2024-47076, CVE-2024-47175, CVE-2024-47176, and CVE-2024-47177) has been detected within the open-source printing system CUPS (present in most Linux distributions). Attackers can achieve remote code execution, potentially leading to complete control of the vulnerable system. Detectify customers can assess whether their systems are running affected versions of CUPS.

CVE-2024-6387 - RCE Vulnerability in OpenSSH

A high-severity remote code execution (RCE) vulnerability, CVE-2024-6387, has been discovered in OpenSSH’s server by the Qualys research team. This vulnerability is particularly concerning as it revives an issue that was previously addressed in 2006, highlighting the persistence of hidden bugs in widely used secure software. This discovery follows another significant vulnerability in the XZ Utils library found just a few months ago, underscoring ongoing security challenges.

Five key takeaways from Outpost24's Cyber Resilience Day 2024

Held in Breda, Netherlands, this year’s Cyber Resilience Day convened industry leaders and cybersecurity experts to address the topic of supply chain attacks and the latest digital threats. The event showcased a series of keynote speeches, panel discussions, and interactive workshops, equipping attendees with valuable insights and actionable strategies to strengthen their organizations’ cyber resilience.