CVE-2019-5892

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

bgpd en FRRouting FRR (también conocido como Free Range Routing), en versiones 2.x y 3.x anteriores a la 3.0.4, versiones 4.x anteriores a la 4.0.1, versiones 5.x anteriores a la 5.0.2 y versiones 6.x anteriores a la 6.0.2 (no afecta a Cumulus Linux o VyOS), cuando ENABLE_BGP_VNC se emplea para Virtual Network Control, permite que atacantes remotos provoquen una denegación de servicio (flap de la sesión de emparejamiento) mediante el atributo 255 en un paquete BGP UPDATE. Esto ocurrió durante Disco en enero de 2019 debido a que FRR no implementa RFC 7606 y, por lo tanto, los paquetes con 255 se consideraron datos VNC inválidos y la sesión BGP se cerró.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-10 CVE Reserved
2019-01-10 CVE Published
2024-06-02 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-436: Interpretation Conflict

CAPEC

References (7)

URL	Tag	Source
https://github.com/FRRouting/frr/releases/tag/frr-3.0.4	Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-4.0.1	Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-5.0.2	Release Notes
https://github.com/FRRouting/frr/releases/tag/frr-6.0.2	Release Notes

URL	Date	SRC

URL	Date	SRC
https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a	2020-08-24
https://lists.frrouting.org/pipermail/frog/2019-January/000404.html	2020-08-24

URL	Date	SRC
https://frrouting.org/community/security/cve-2019-5892.html	2020-08-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Frrouting Search vendor "Frrouting"		Frrouting Search vendor "Frrouting" for product "Frrouting"				>= 2.0 <= 2.0.2 Search vendor "Frrouting" for product "Frrouting" and version " >= 2.0 <= 2.0.2"		-		Affected
Frrouting Search vendor "Frrouting"		Frrouting Search vendor "Frrouting" for product "Frrouting"				>= 3.0 < 3.0.4 Search vendor "Frrouting" for product "Frrouting" and version " >= 3.0 < 3.0.4"		-		Affected
Frrouting Search vendor "Frrouting"		Frrouting Search vendor "Frrouting" for product "Frrouting"				>= 5.0 < 5.0.2 Search vendor "Frrouting" for product "Frrouting" and version " >= 5.0 < 5.0.2"		-		Affected
Frrouting Search vendor "Frrouting"		Frrouting Search vendor "Frrouting" for product "Frrouting"				>= 6.0 < 6.0.2 Search vendor "Frrouting" for product "Frrouting" and version " >= 6.0 < 6.0.2"		-		Affected
Frrouting Search vendor "Frrouting"		Frrouting Search vendor "Frrouting" for product "Frrouting"				4.0 Search vendor "Frrouting" for product "Frrouting" and version "4.0"		-		Affected