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CVE-2019-5599

7.5 · HIGH

In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an attacker to cause several linked lists to grow unbounded and caus…

Published Jul 2, 2019CWE-770EPSS 5.08%

Overview

CVE-2019-5599 is a high-severity vulnerability. It was published on July 2, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an attacker to cause several linked lists to grow unbounded and cause an expensive list traversal on every packet being processed, leading to resource exhaustion and a denial of service.

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

Refpacketstormsecurity.com/files/153329/Linux-FreeBSD-TCP-Based-Denial-Of-Service.htmlRefpacketstormsecurity.com/files/153378/FreeBSD-Security-Advisory-FreeBSD-SA-19-08.rack.htmlRefwww.openwall.com/lists/oss-security/2019/06/17/5GitHubgithub.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.mdRefkb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193Refseclists.org/bugtraq/2019/Jun/27Refsecurity.FreeBSD.org/advisories/FreeBSD-SA-19:08.rack.ascRefsecurity.netapp.com/advisory/ntap-20190625-0004/Refsupport.f5.com/csp/article/K75521003Refwww.kb.cert.org/vuls/id/905115

How CyberStrike helps

Frequently asked questions

What is CVE-2019-5599?

CVE-2019-5599 is a high-severity vulnerability. It was published on July 2, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2019-5599?

This vulnerability has a CVSS 3.0 base score of 7.5, 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-2019-5599?

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-2019-5599?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-5599 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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