CVE-2020-1646

Junos OS and Junos OS Evolved: RPD crash while processing a specific BGP update information.

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

On Juniper Networks Junos OS and Junos OS Evolved devices, processing a specific UPDATE for an EBGP peer can lead to a routing process daemon (RPD) crash and restart. This issue occurs only when the device is receiving and processing the BGP UPDATE for an EBGP peer. This issue does not occur when the device is receiving and processing the BGP UPDATE for an IBGP peer. However, the offending BGP UPDATE can originally come from an EBGP peer, propagates through the network via IBGP peers without causing crash, then it causes RPD crash when it is processed for a BGP UPDATE towards an EBGP peer. Repeated receipt and processing of the same specific BGP UPDATE can result in an extended Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 17.3R3-S6, 17.4R2-S7, and 18.1R3-S7. Juniper Networks Junos OS Evolved 19.2R2-EVO and later versions, prior to 19.3R1-EVO. Other Junos OS releases are not affected.

En los dispositivos Juniper Networks Junos OS y Junos OS Evolved, el procesamiento de un UPDATE específica para un peer EBGP puede conllevar a un bloqueo y reinicio del demonio del proceso de enrutamiento (RPD). Este problema se produce solo cuando el dispositivo está recibiendo y procesando la BGP UPDATE para un peer EBGP. Este problema no se produce cuando el dispositivo recibe y procesa el BGP UPDATE para un peer IBGP. Sin embargo, el BGP UPDATE ofensivo puede provenir originalmente desde un peer EBGP, se propaga por medio de la red por medio de los peer IBGP sin causar un bloqueo, luego causa un bloqueo de RPD cuando es procesado para un BGP UPDATE hacia un peer EBGP. La recepción y el procesamiento repetido de la misma BGP UPDATE específica pueden resultar en una condición extendida de Denegación de Servicio (DoS). Este problema afecta a: Juniper Networks Junos OS: 17.3R3-S6, 17.4R2-S7 y 18.1R3-S7. Juniper Networks Junos OS Evolved 19.2R2-EVO y versiones posteriores, anteriores a 19.3R1-EVO. Otras versiones del Junos OS no están afectadas

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-11-04 CVE Reserved
2020-07-17 CVE Published
2023-04-02 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-159: Improper Handling of Invalid Use of Special Elements

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://kb.juniper.net/JSA11033	2022-01-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.3 Search vendor "Juniper" for product "Junos" and version "17.3"		r3-s6		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				17.4 Search vendor "Juniper" for product "Junos" and version "17.4"		r2-s7		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				18.1 Search vendor "Juniper" for product "Junos" and version "18.1"		r3-s7		Affected
Juniper Search vendor "Juniper"		Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved"				19.2 Search vendor "Juniper" for product "Junos Os Evolved" and version "19.2"		r2		Affected