Alma Linux: CVE-2024-6409: Moderate: openssh security update (ALSA-2024-4457)
Description
A race condition vulnerability was discovered in how signals are handled by OpenSSH's server (sshd). If a remote attacker does not authenticate within a set time period, then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog(). As a consequence of a successful attack, in the worst case scenario, an attacker may be able to perform a remote code execution (RCE) as an unprivileged user running the sshd server.
Solution(s)
- alma-upgrade-openssh
- alma-upgrade-openssh-askpass
- alma-upgrade-openssh-clients
- alma-upgrade-openssh-keycat
- alma-upgrade-openssh-server
- alma-upgrade-pam_ssh_agent_auth
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