CVE-2019-5597

CRITICAL

FreeBSD 11.2-RELEASE < 11.2-RELEASE-p10 and 12.0-RELEASE < 12.0-RELEASE-p4 - DoS via IPv6 Fragment Reassembly

Title source: llm
STIX 2.1

Description

In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of the first packet allowing maliciously crafted IPv6 packets to cause a crash or potentially bypass the packet filter.

References (6)

Core 6
Core References
Patch, Vendor Advisory x_refsource_misc
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:05.pf.asc
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/108395
Vendor Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20190611-0001/

Scores

CVSS v3 9.1
EPSS 0.0208
EPSS Percentile 84.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Details

CWE
CWE-20
Status published
Products (2)
freebsd/freebsd 11.2 (8 CPE variants)
freebsd/freebsd 12.0 (3 CPE variants)
Published May 15, 2019
Tracked Since Feb 18, 2026