CVE-2019-5892

MEDIUM

FRRouting 2.x-3.x < 3.0.4, 4.x < 4.0.1, 5.x < 5.0.2, 6.x < 6.0.2 - Denial of Service via BGP UPDATE Attribute 255

Title source: llm
STIX 2.1

Description

bgpd in FRRouting FRR (aka Free Range Routing) 2.x and 3.x before 3.0.4, 4.x before 4.0.1, 5.x before 5.0.2, and 6.x before 6.0.2 (not affecting Cumulus Linux or VyOS), when ENABLE_BGP_VNC is used for Virtual Network Control, allows remote attackers to cause a denial of service (peering session flap) via attribute 255 in a BGP UPDATE packet. This occurred during Disco in January 2019 because FRR does not implement RFC 7606, and therefore the packets with 255 were considered invalid VNC data and the BGP session was closed.

References (7)

Core 7
Core References
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1

Scores

CVSS v3 6.5
EPSS 0.0272
EPSS Percentile 84.0%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-436
Status published
Products (2)
frrouting/frrouting 4.0
frrouting/frrouting 2.0 - 2.0.2
Published Jan 10, 2019
Tracked Since Feb 18, 2026