CVE-2021-31363
Junos OS and Junos OS Evolved: Receipt of a specific LDP message will cause a Denial of Service
Severity Score
6.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
In an MPLS P2MP environment a Loop with Unreachable Exit Condition vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause high load on RPD which in turn may lead to routing protocol flaps. If a system with sensor-based-stats enabled receives a specific LDP FEC this can lead to the above condition. Continued receipted of such an LDP FEC will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 19.2 version 19.2R2 and later versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2-S1, 20.2R3; 20.3 versions prior to 20.3R1-S2, 20.3R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R2. Juniper Networks Junos OS Evolved All versions prior to 20.1R2-S3-EVO; 20.3 versions prior to 20.3R1-S2-EVO.
En un entorno MPLS P2MP, una vulnerabilidad de bucle con condición de salida no alcanzable en el demonio del protocolo de enrutamiento (RPD) de Juniper Networks Junos OS y Junos OS Evolved permite a un atacante adyacente no autenticado causar una alta carga en el RPD, lo que a su vez puede conllevar a interrupciones del protocolo de enrutamiento. Si un sistema con las estadísticas basadas en sensores habilitadas recibe un LDP FEC específico, esto puede conllevar a una condición anterior. Una recepción continuada de tal LDP FEC creará una condición de Denegación de Servicio (DoS) sostenida. Este problema afecta: Juniper Networks Junos OS 19.2 versión 19.2R2 y versiones posteriores anteriores a 19.2R3-S3; versiones 19.3 anteriores a 19.3R2-S6, 19.3R3-S2; versiones 19.4 anteriores a 19. 4R1-S4, 19.4R2-S4, 19.4R3-S2; versiones 20.1 anteriores a 20.1R2-S1, 20.1R3; versiones 20.2 anteriores a 20.2R2-S1, 20.2R3; versiones 20.3 anteriores a 20.3R1-S2, 20.3R2. Este problema no afecta a las versiones de Juniper Networks Junos OS anteriores a 19.2R2. Juniper Networks Junos OS Evolved Todas las versiones anteriores a 20.1R2-S3-EVO; versiones 20.3 anteriores a 20.3R1-S2-EVO
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-04-15 CVE Reserved
- 2021-10-19 CVE Published
- 2024-06-28 EPSS Updated
- 2024-09-16 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
References (1)
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" | 19.2 Search vendor "Juniper" for product "Junos" and version "19.2" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.2 Search vendor "Juniper" for product "Junos" and version "19.2" | r2-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.2 Search vendor "Juniper" for product "Junos" and version "19.2" | r3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.2 Search vendor "Juniper" for product "Junos" and version "19.2" | r3-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.2 Search vendor "Juniper" for product "Junos" and version "19.2" | r3-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | - |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r2-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r2-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r2-s3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r2-s4 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r2-s5 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.3 Search vendor "Juniper" for product "Junos" and version "19.3" | r3-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.4 Search vendor "Juniper" for product "Junos" and version "19.4" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.4 Search vendor "Juniper" for product "Junos" and version "19.4" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.4 Search vendor "Juniper" for product "Junos" and version "19.4" | r1-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.4 Search vendor "Juniper" for product "Junos" and version "19.4" | r1-s3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.4 Search vendor "Juniper" for product "Junos" and version "19.4" | r2-s4 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 19.4 Search vendor "Juniper" for product "Junos" and version "19.4" | r3-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r1-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r1-s3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r1-s4 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.1 Search vendor "Juniper" for product "Junos" and version "20.1" | r3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.2 Search vendor "Juniper" for product "Junos" and version "20.2" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.2 Search vendor "Juniper" for product "Junos" and version "20.2" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.2 Search vendor "Juniper" for product "Junos" and version "20.2" | r1-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.2 Search vendor "Juniper" for product "Junos" and version "20.2" | r1-s3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.2 Search vendor "Juniper" for product "Junos" and version "20.2" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.2 Search vendor "Juniper" for product "Junos" and version "20.2" | r3 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.3 Search vendor "Juniper" for product "Junos" and version "20.3" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.3 Search vendor "Juniper" for product "Junos" and version "20.3" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Search vendor "Juniper" for product "Junos" | 20.3 Search vendor "Juniper" for product "Junos" and version "20.3" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.1 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.1" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.1 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.1" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.1 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.1" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.1 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.1" | r2-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.1 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.1" | r2-s2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.2 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.2" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.2 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.2" | r1-s1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.2 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.2" | r2 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.3 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.3" | r1 |
Affected
| ||||||
| Juniper Search vendor "Juniper" | Junos Os Evolved Search vendor "Juniper" for product "Junos Os Evolved" | 20.3 Search vendor "Juniper" for product "Junos Os Evolved" and version "20.3" | r1-s1 |
Affected
| ||||||