CVE-2024-6409

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.

Affected products

Almalinux, Openssh, Red Hat, Rocky Linux

Fix

Available

CVSS 3.1

7.0 HIGH

EPSS

27.9% (98th percentile)

Weakness

CWE-364

NVD status

Deferred

Published

2024-07-08