USN-6892-1: OpenSSH remote code execution (regreSSHion)
A signal handler race condition in the OpenSSH server carries a risk of unauthenticated RCE as root.
A signal handler race condition in the OpenSSH server carries a risk of unauthenticated RCE as root.
The CVE-2024-6387 (regreSSHion) vulnerability in the OpenSSH sshd service stems from a race condition in the signal handler. Under certain conditions, remote, unauthenticated code execution as root is possible.
glibc-based OpenSSH versions 8.5p1 – 9.7p1. The version in the Ubuntu 22.04 LTS repositories is affected.
sudo apt upgrade openssh-serverLoginGraceTime 0 (NOTE: increases DoS risk)Velociraptor allows some sensitive artifacts to be gated by additional permissions. For example, the Linux.Sys.BashShell artifact allows arbitrary command execution on endpoints, and so it requires the EXECVE permission to schedule. However, no such check was implemented for client monitoring artifacts. Additionally there was no requirement that client monitoring artifacts carry the CLIENT_EVENTS type. This allows any user who can schedule client monitoring artifacts to also
Linux Kernel contains an unspecified vulnerability that can allow for privilege escalation via IPv6 networking subsystem. This vulnerability can impact multiple products, including but not limited to Suse, Red Hat, and other products using Linux.
Linux Kernel contains an out-of-bounds memory write vulnerability which could allow a local user to gain privileged access or cause a denial of service on the system.