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CVE-2024-7589

8.1 · HIGH

A signal handler in sshd(8) may call a logging function that is not async-signal-safe.

Published Aug 12, 2024CWE-362EPSS 2.04%

Overview

CVE-2024-7589 is a high-severity vulnerability. It was published on August 12, 2024 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refsecurity.freebsd.org/advisories/FreeBSD-SA-24:08.openssh.ascRefwww.cve.org/CVERecord?id=CVE-2006-5051Refwww.cve.org/CVERecord?id=CVE-2024-6387Refsecurity.netapp.com/advisory/ntap-20240816-0002/

How CyberStrike helps

Frequently asked questions

What is CVE-2024-7589?

CVE-2024-7589 is a high-severity vulnerability. It was published on August 12, 2024 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2024-7589?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-7589?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-7589?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-7589 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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