#1 Trusted Cybersecurity News Platform Followed by 4.50+ million
The Hacker News Logo
Subscribe – Get Latest News
Insider Risk Management

ssh security | Breaking Cybersecurity News | The Hacker News

Experts Uncover Passive Method to Extract Private RSA Keys from SSH Connections

Experts Uncover Passive Method to Extract Private RSA Keys from SSH Connections

Nov 27, 2023 Server Security / Encryption
A new study has demonstrated that it's possible for passive network attackers to obtain private RSA host keys from a vulnerable SSH server by observing when naturally occurring computational faults that occur while the connection is being established. The Secure Shell (SSH) protocol is a method for securely transmitting commands and logging in to a computer over an unsecured network. Based on a client-server architecture, SSH uses cryptography to authenticate and encrypt connections between devices. A host key is a cryptographic key used for authenticating computers in the SSH protocol. Host keys are key pairs that are typically generated using public-key cryptosystems like RSA . "If a signing implementation using CRT-RSA has a fault during signature computation, an attacker who observes this signature may be able to compute the signer's private key," a group of academics from the University of California, San Diego, and Massachusetts Institute of Technology said
36-Year-Old SCP Clients' Implementation Flaws Discovered

36-Year-Old SCP Clients' Implementation Flaws Discovered

Jan 15, 2019
A set of 36-year-old vulnerabilities has been uncovered in the Secure Copy Protocol (SCP) implementation of many client applications that can be exploited by malicious servers to overwrite arbitrary files in the SCP client target directory unauthorizedly. Session Control Protocol (SCP), also known as secure copy, is a network protocol that allows users to securely transfer files between a local host and a remote host using RCP (Remote Copy Protocol) and SSH protocol. In other terms, SCP, which dates back to 1983, is a secure version of RCP that uses authentication and encryption of SSH protocol to transfer files between a server and a client. Discovered by Harry Sintonen, one of F-Secure's Senior Security Consultants, the vulnerabilities exist due to poor validations performed by the SCP clients, which can be abused by malicious servers or man-in-the-middle (MiTM) attackers to drop or overwrite arbitrary files on the client's system. "Many scp clients fail to ver
LibSSH Flaw Allows Hackers to Take Over Servers Without Password

LibSSH Flaw Allows Hackers to Take Over Servers Without Password

Oct 17, 2018
A four-year-old severe vulnerability has been discovered in the Secure Shell (SSH) implementation library known as Libssh that could allow anyone to completely bypass authentication and gain unfettered administrative control over a vulnerable server without requiring a password. The security vulnerability, tracked as CVE-2018-10933 , is an authentication-bypass issue that was introduced in Libssh version 0.6 released earlier 2014, leaving thousands of enterprise servers open to hackers for the last four years. But before you get frightened, you should know that neither the widely used OpenSSH nor Github's implementation of libssh was affected by the vulnerability. The vulnerability resides due to a coding error in Libssh and is "ridiculously simple" to exploit. According to a security advisory published Tuesday, all an attacker needs to do is sending an "SSH2_MSG_USERAUTH_SUCCESS" message to a server with an SSH connection enabled when it expects an &
cyber security

Demonstrate Responsible AI: Get the ISO 42001 Compliance Checklist from Vanta

websiteVantaCompliance / Security Audit
ISO 42001 helps organizations demonstrate trustworthy AI practices in accordance with global standards. With Vanta, completing the requirements for ISO 42001 compliance can be done in a fraction of the time. Download the checklist to get started.
It's Time to Master the Lift & Shift: Migrating from VMware vSphere to Microsoft Azure

It's Time to Master the Lift & Shift: Migrating from VMware vSphere to Microsoft Azure

May 15, 2024Enterprise Security / Cloud Computing
While cloud adoption has been top of mind for many IT professionals for nearly a decade, it's only in recent months, with industry changes and announcements from key players, that many recognize the time to make the move is now. It may feel like a daunting task, but tools exist to help you move your virtual machines (VMs) to a public cloud provider – like Microsoft Azure – with relative ease. Transitioning from VMware vSphere to Microsoft Azure requires careful planning and execution to ensure a smooth migration process. In this guide, we'll walk through the steps involved in moving your virtualized infrastructure to the cloud giant, Microsoft Azure. Whether you're migrating your entire data center or specific workloads, these steps will help you navigate the transition effectively. 1. Assess Your Environment: Before diving into the migration process, assess your current VMware vSphere environment thoroughly. Identify all virtual machines (VMs), dependencies, and resource
Bug in OpenSSH Opens Linux Machines to Password Cracking Attack

Bug in OpenSSH Opens Linux Machines to Password Cracking Attack

Jul 23, 2015
A simple but highly critical vulnerability recently disclosed in the most widely used OpenSSH software allows attackers to try thousands of password login attempts per connection in a short period. OpenSSH is the most popular software widely used for secure remote access to Linux-based systems. Generally, the software allows 3 to 6 Password login attempts before closing a connection, but a new vulnerability lets attackers perform thousands of authentication requests remotely . OpenSSH servers with keyboard-interactive authentication enabled , including FreeBSD Linux, can be exploited to carry out the brute force attack on OpenSSH protocol, a security researcher with online alias KingCope explained in a blog post . Exploit for the Vulnerability RELEASED  Hackers could widely exploit the vulnerability because the keyboard-interactive authentication is by default enabled on most of the systems. Researcher has also released a proof-of-concept exploit code, which i
Cybersecurity
Expert Insights
Cybersecurity Resources