VULNERABILITY INTELLIGENCE
CVE-2024-6409
CVSS score7 HIGH
EPSS probability27.93%
CISA KEVNot currently listed
Published2024-07-08
Last modified2026-10-15
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
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.
Weakness classification
- secalert@redhat.com: CWE-364