PT-2019-2419 · Freebsd · Freebsd

Published 2019-06-17 · Updated 2025-05-06 · CVE-2019-5599

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions FreeBSD versions 12.0-STABLE before r349197 FreeBSD versions 12.0-RELEASE before 12.0-RELEASE-p6

Description The issue is caused by a bug in the non-default RACK TCP stack, allowing an attacker to cause linked lists to grow unbounded, leading to resource exhaustion and a denial of service. This can be achieved by sending a specially crafted sequence of SACK packets, potentially allowing a remote attacker to cause a denial of service.

Recommendations For FreeBSD versions 12.0-STABLE before r349197, update to a version after r349197 to resolve the issue. For FreeBSD versions 12.0-RELEASE before 12.0-RELEASE-p6, update to 12.0-RELEASE-p6 or later to resolve the issue.

Fix

DoS

Allocation of Resources Without Limits

Resource Exhaustion

Weakness Enumeration

CWE-770

CWE-400

Related Identifiers

BDU:2019-02197

CVE-2019-5599

FREEBSD-SA-19_08

MGASA-2019-0195

MGASA-2019-0196

MGASA-2019-0197

Affected Products

Freebsd

References · 37

• https://osv.dev/vulnerability/MGASA-2019-0196 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2019-0195 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-5599 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-5599 · Security Note
• https://advisories.mageia.org/MGASA-2019-0197.html · Security Note
• https://advisories.mageia.org/MGASA-2019-0195.html · Security Note
• https://seclists.org/bugtraq/2019/Jun/27 · Patch
• https://security.freebsd.org/advisories/FreeBSD-SA-19:08.rack.asc · Vendor Advisory
• https://advisories.mageia.org/MGASA-2019-0196.html · Security Note
• https://osv.dev/vulnerability/MGASA-2019-0197 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-02197 · Security Note
• https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md · Note
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.120 · Note
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193 · Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/162666 · Note