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The Hacker News - Cybersecurity News and Analysis: private SSH keys

OpenSSH now supports FIDO U2F security keys for 2-factor authentication

OpenSSH now supports FIDO U2F security keys for 2-factor authentication

February 17, 2020Swati Khandelwal
Here's excellent news for sysadmins. You can now use a physical security key as hardware-based two-factor authentication to securely log into a remote system via SSH protocol. OpenSSH, one of the most widely used open-source implementations of the Secure Shell (SSH) Protocol, yesterday announced the 8.2 version of the software that primarily includes two new significant security enhancements. First, OpenSSH 8.2 added support for FIDO/U2F hardware authenticators , and the second, it has deprecated SSH-RSA public key signature algorithm and planned to disable it by default in the future versions of the software. FIDO (Fast Identity Online) protocol based hardware security devices are stronger and fool-proof mechanisms for authentication because it enables public-key cryptography to protect against advanced malware, phishing, and man-in-the-middle attacks. "In OpenSSH, FIDO devices are supported by new public key types' ecdsa-sk' and 'ed25519-sk', along
OpenSSH Now Encrypts Secret Keys in Memory Against Side-Channel Attacks

OpenSSH Now Encrypts Secret Keys in Memory Against Side-Channel Attacks

June 22, 2019Mohit Kumar
In recent years, several groups of cybersecurity researchers have disclosed dozens of memory side-channel vulnerabilities in modern processors and DRAM s, like Rowhammer , RAMBleed , Spectre, and Meltdown . Have you ever noticed they all had at least one thing in common? That's OpenSSH. As a proof-of-concept, many researchers demonstrated their side-channel attacks against OpenSSH application installed on a targeted computer, where an unprivileged attacker-owned process exploits memory read vulnerabilities to steal secret SSH private keys from the restricted memory regions of the system. That's possible because OpenSSH has an agent that keeps a copy of your SSH key in the memory so that you don't have to type your passphrase every time you want to connect to the same remote server. However, modern operating systems by default store sensitive data, including encryption keys and passwords, in the kernel memory which can not be accessed by user-level privileged p
Simplifying SSH keys and SSL Certs Management across the Enterprise using Key Manager Plus

Simplifying SSH keys and SSL Certs Management across the Enterprise using Key Manager Plus

November 01, 2016Swati Khandelwal
With rapidly growing web-based services and widely expanding locations, organizations are using more and more SSL certificates as well as SSH keys than ever. From authentication, confidentiality, and integrity to preventing the organization from industrial espionage, SSL certificates play an important role. Managing SSL certificates across networks to ensure protection and prevent unanticipated failures is critical, and it also becomes complicated with multiple locations, divisions as well as the fastest growing use of external cloud-based services. This not only complicates the process of managing individual SSL certificate and SSH key for an administrator but also costs organizations heavily. A key solution for this issue is to use an advanced and efficient SSL certificate and SSH Key management system. An effective solution enables an organization to know what kinds of certificates and keys it has, simplifies certificate discovery and monitor across multiple vendors, an
Hundreds of SSH Private Keys exposed via GitHub Search

Hundreds of SSH Private Keys exposed via GitHub Search

January 25, 2013Mohit Kumar
GitHub is a source code repository which lets developers work on programs together as a team, even when they are in different locations. Each repository on the site is a public folder designed to hold the software code that a developer is working on. This Tuesday GitHub announced a major upgrades to the site's search engine, " Finding great code on GitHub just got a whole lot easier, ". Yesterday few twitter users pointed out that there is no shortage of embedded private SSH keys and passwords that can easily be found via GitHub new feature. If you upload security information (keys/passwords etc) to a public repository, new search feature will allow anyone to find them. Today, GitHub's search function stopped working , though the site didn't acknowledge the cause. Updated message is " Search remains unavailable. The cluster is recovering slowly and we continue to monitor its progress. We'll provide further updates as they become available
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