Security News
A doozy of a bug that could allow any local user on most Linux or Unix systems to gain root access has been uncovered - and it had been sitting there for a decade, researchers said. The bug was found in Sudo, a utility built into most Unix and Linux operating systems that lets a user without security privileges access and run a program with the credentials of another user.
TeamTNT now further upgraded their malware to evade detection after infecting and deploying malicious coinminer payloads on Linux devices. "The group is using a new detection evasion tool, copied from open source repositories," AT&T Alien Labs security researcher Ofer Caspi says in a report published today.
A vulnerability in sudo, a powerful and near-ubiquitous open-source utility used on major Linux and Unix-like operating systems, could allow any unprivileged local user to gain root privileges on a vulnerable host. "This vulnerability is perhaps the most significant sudo vulnerability in recent memory and has been hiding in plain sight for nearly 10 years," said Mehul Revankar, Vice President Product Management and Engineering, Qualys, VMDR, and noted that there are likely to be millions of assets susceptible to it.
CloudLinux announces the expansion of its affordable Extended Lifecycle Support services for Linux distributions, by providing its own updates and security patches for several years after expiration of the products' end-of-life date. Oracle Linux 6 Extended Lifecycle Support service will be available starting in February 2021 and will extend to February 2025.
Security researchers from Qualys have identified a critical heap buffer overflow vulnerability in sudo that can be exploited by rogue users to take over the host system. Sudo is an open-source command-line utility widely used on Linux and other Unix-flavored operating systems.
A now-fixed Sudo vulnerability allowed any local user to gain root privileges on Unix-like operating systems without requiring authentication. Sudo is a Unix program that enables system admins to provide limited root privileges to normal users listed in the sudoers file, while at the same time keeping a log of their activity.
Jack Wallen walks you through some of the steps you can take to check for and mitigate distributed denial of service attacks on a Linux server. Recently I wrote a piece on how to detect and stop a DoS attack on Linux.
If you're not sure how to view your SSH certificates, Jack Wallen walks you through the steps on Linux, macOS, and Windows.
A recently identified piece of malware is targeting Linux devices to ensnare them into a botnet capable of malicious activities such as distributed denial of service and crypto-mining attacks. Dubbed FreakOut, the malware is infecting devices that haven't yet received patches for three relatively new vulnerabilities, including one that was made public earlier this month.
Researchers are warning a novel malware variant is targeting Linux devices, in order to add endpoints to a botnet to then be utilized in distributed-denial-of-service attacks and cryptomining. It is actively adding infected Linux devices to a botnet, and has the ability to launch DDoS and network flooding attacks, as well as cryptomining activity.