OpenSSH Pre-Auth Double Free – CVE-2023-25136 – Writeup and Proof-of-Concept


The newly released OpenSSH version 9.2p1 contains a fix for the double-free vulnerability.

Given that this vulnerability could have a significant impact on his OpenSSH server (DoS/RCE) and is highly popular in the industry, this security fix allows the JFrog security research team to investigate the vulnerability. I came to

This blog post provides details of the vulnerability, who is affected, and a proof of concept that triggers the exposure to cause a denial of service (DoS).


What is OpenSSH?

OpenSSH is a popular tool for secure communication and remote access. It was developed as a free, open-source implementation of the Secure Shell (SSH) communication protocol and is widely used in various applications.

OpenSSH provides a secure and encrypted connection between two untrusted hosts over an insecure network, making it an essential tool for remote access and secure file transfers.

With the increasing use of cloud computing and remote access to servers, OpenSSH has become an important tool for system administrators and developers who need to securely access and manage remote systems.

OpenSSH also supports a wide range of platforms such as Linux, macOS, and Windows, making it a widely used tool across various operating systems. The ease of use and robust security features have made OpenSSH the industry standard tool for secure remote access. 


Post a Comment

Previous Post Next Post

Contact Form