CVE-2019-5892 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://frrouting.org/community/security/cve-2019-5892.html https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a https://github.com/FRRouting/frr/releases/tag/frr-3.0.4 https://github.com/FRRouting/frr/releases/tag/frr-4.0.1 https://github.com/FRRouting/frr/releases/tag/frr-5.0.2 https://github.com/FRRouting/frr/releases/tag/frr-6.0.2 https://lists.frrouting.org/pipermail/frog/2019-January/000404.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5