Detections
Analytics
CVE-2024-6409
high
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.
References
https://www.theregister.com/2024/07/11/openssh_bug_in_rhel_9/
https://www.openwall.com/lists/oss-security/2024/07/10/2
https://securityaffairs.com/165535/hacking/openssh-flaw-cve-2024-6409.html?web_view=true
https://bugzilla.redhat.com/show_bug.cgi?id=2295085
https://access.redhat.com/security/cve/CVE-2024-6409
https://access.redhat.com/errata/RHSA-2024:5444
https://access.redhat.com/errata/RHSA-2024:4960
https://access.redhat.com/errata/RHSA-2024:4955
https://access.redhat.com/errata/RHSA-2024:4910
https://access.redhat.com/errata/RHSA-2024:4716