Vulnerability Description
A signal handler in sshd(8) may call a logging function that is not async-signal-safe. The signal handler is invoked when a client does not authenticate within the LoginGraceTime seconds (120 by default). This signal handler executes in the context of the sshd(8)'s privileged code, which is not sandboxed and runs with full root privileges. This issue is another instance of the problem in CVE-2024-6387 addressed by FreeBSD-SA-24:04.openssh. The faulty code in this case is from the integration of blacklistd in OpenSSH in FreeBSD. As a result of calling functions that are not async-signal-safe in the privileged sshd(8) context, a race condition exists that a determined attacker may be able to exploit to allow an unauthenticated remote code execution as root.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freebsd | Freebsd | < 13.0 |
Related Weaknesses (CWE)
References
- https://security.freebsd.org/advisories/FreeBSD-SA-24:08.openssh.ascVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2006-5051Not Applicable
- https://www.cve.org/CVERecord?id=CVE-2024-6387Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240816-0002/
FAQ
What is CVE-2024-7589?
CVE-2024-7589 is a vulnerability with a CVSS score of 8.1 (HIGH). A signal handler in sshd(8) may call a logging function that is not async-signal-safe. The signal handler is invoked when a client does not authenticate within the LoginGraceTime seconds (120 by defa...
How severe is CVE-2024-7589?
CVE-2024-7589 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-7589?
Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.