CVE-2019-5599

Name: CVE-2019-5599
Creator: NVD / NIST
Published: 2019-07-02T21:15:11.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 5.23%

Last modified Jun 17, 2026

CVE-2019-5599 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 5.23% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

5.23%

91.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Freebsd	Freebsd	12.0

References

http://packetstormsecurity.com/files/153329/Linux-FreeBSD-TCP-Based-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
http://packetstormsecurity.com/files/153378/FreeBSD-Security-Advisory-FreeBSD-SA-19-08.rack.htmlThird Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2019/06/17/5Mailing List, Third Party Advisory
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.mdMitigation, Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193Third Party Advisory
https://seclists.org/bugtraq/2019/Jun/27Mailing List, Mitigation, Patch, Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:08.rack.ascMitigation, Vendor Advisory
https://security.netapp.com/advisory/ntap-20190625-0004/Third Party Advisory
https://support.f5.com/csp/article/K75521003Third Party Advisory
https://www.kb.cert.org/vuls/id/905115Third Party Advisory, US Government Resource
http://packetstormsecurity.com/files/153329/Linux-FreeBSD-TCP-Based-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
http://packetstormsecurity.com/files/153378/FreeBSD-Security-Advisory-FreeBSD-SA-19-08.rack.htmlThird Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2019/06/17/5Mailing List, Third Party Advisory
https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.mdMitigation, Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193Third Party Advisory
https://seclists.org/bugtraq/2019/Jun/27Mailing List, Mitigation, Patch, Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:08.rack.ascMitigation, Vendor Advisory
https://security.netapp.com/advisory/ntap-20190625-0004/Third Party Advisory
https://support.f5.com/csp/article/K75521003Third Party Advisory
https://www.kb.cert.org/vuls/id/905115Third Party Advisory, US Government Resource

Timeline

Published: Jul 2, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5599?

How severe is CVE-2019-5599?

Severity scoring for CVE-2019-5599 is pending analysis. The EPSS model estimates a 5.23% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5599?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-5599?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST