Understanding the regreSSHion Vulnerability in OpenSSH

Understanding the regreSSHion Vulnerability in OpenSSH

The regreSSHion vulnerability (CVE-2024-6387) in OpenSSH’s server (sshd) on glibc-based Linux systems is a critical flaw due to a signal handler race condition. This vulnerability, a regression of CVE-2006-5051, allows unauthenticated remote code execution as root. It affects sshd’s default configuration and was reintroduced in OpenSSH 8.5p1. Immediate mitigation includes applying patches and adjusting `LoginGraceTime`. This issue underscores the importance of thorough regression testing and vigilant patch management in cybersecurity.

SSH key ed25519
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Ed25519 ssh keys

What are Ed25519 ssh keys? Ed25519 SSH keys are a type of public-key cryptography used for secure communication over a network. They are based on the Ed25519 elliptic curve algorithm, which is a variant of the elliptic curve algorithm used for digital signatures. The Ed25519 algorithm was designed to be faster and more secure than…