What’s Vulnerable › Vulnerabilities

CVE-2024-6409: Openssh: possible remote code execution due to a race condition in signal handling affecting red hat enterprise linux 9

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.

Affected products

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 9 0:8.7p1-38.el9_4.4; Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:8.7p1-12.el9_0.3; Red Hat Enterprise Linux 9.2 Extended Update Support 0:8.7p1-30.el9_2.7; Red Hat OpenShift Container Platform 4.13 413.92.202408122222-0; Red Hat OpenShift Container Platform 4.14 414.92.202407300859-0; Red Hat OpenShift Container Platform 4.15 415.92.202407301159-0; Red Hat OpenShift Container Platform 4.16 416.94.202407171205-0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-6409 or the next vulnerability affects your stack