CVE-2020-3479
Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A vulnerability in the implementation of Multiprotocol Border Gateway Protocol (MP-BGP) for the Layer 2 VPN (L2VPN) Ethernet VPN (EVPN) address family in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of Border Gateway Protocol (BGP) update messages that contain crafted EVPN attributes. An attacker could exploit this vulnerability by sending BGP update messages with specific, malformed attributes to an affected device. A successful exploit could allow the attacker to cause an affected device to crash, resulting in a DoS condition.
Una vulnerabilidad en la implementación de Multiprotocol Border Gateway Protocol (MP-BGP) para la familia de direcciones Layer 2 VPN (L2VPN) Ethernet VPN (EVPN) en Cisco IOS Software y Cisco IOS XE Software, podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS). La vulnerabilidad es debido al procesamiento incorrecto de los mensajes de actualización del Border Gateway Protocol (BGP) que contienen atributos EVPN diseñados. Un atacante podría explotar esta vulnerabilidad mediante el envío mensajes de actualización de BGP con atributos específicos malformado hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante causar el bloqueo de un dispositivo afectado, resultando en una condición de DoS.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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
- 2019-12-12 CVE Reserved
- 2020-09-24 CVE Published
- 2023-06-10 EPSS Updated
- 2024-09-16 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
- CWE-400: Uncontrolled Resource Consumption
CAPEC
References (1)
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1100 Integrated Services Router Search vendor "Cisco" for product "1100 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1101 Integrated Services Router Search vendor "Cisco" for product "1101 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1109 Integrated Services Router Search vendor "Cisco" for product "1109 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1111x Integrated Services Router Search vendor "Cisco" for product "1111x Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 111x Integrated Services Router Search vendor "Cisco" for product "111x Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1120 Integrated Services Router Search vendor "Cisco" for product "1120 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1160 Integrated Services Router Search vendor "Cisco" for product "1160 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4221 Integrated Services Router Search vendor "Cisco" for product "4221 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4321 Integrated Services Router Search vendor "Cisco" for product "4321 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4331 Integrated Services Router Search vendor "Cisco" for product "4331 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4351 Integrated Services Router Search vendor "Cisco" for product "4351 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4431 Integrated Services Router Search vendor "Cisco" for product "4431 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4451-x Integrated Services Router Search vendor "Cisco" for product "4451-x Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4461 Integrated Services Router Search vendor "Cisco" for product "4461 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1001-hx Search vendor "Cisco" for product "Asr 1001-hx" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1001-x Search vendor "Cisco" for product "Asr 1001-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1002-hx Search vendor "Cisco" for product "Asr 1002-hx" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1002-x Search vendor "Cisco" for product "Asr 1002-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1004 Search vendor "Cisco" for product "Asr 1004" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1006 Search vendor "Cisco" for product "Asr 1006" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1006-x Search vendor "Cisco" for product "Asr 1006-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1009-x Search vendor "Cisco" for product "Asr 1009-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1013 Search vendor "Cisco" for product "Asr 1013" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Search vendor "Cisco" for product "Ios" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Cloud Services Router 1000v Search vendor "Cisco" for product "Cloud Services Router 1000v" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1100 Integrated Services Router Search vendor "Cisco" for product "1100 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1101 Integrated Services Router Search vendor "Cisco" for product "1101 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1109 Integrated Services Router Search vendor "Cisco" for product "1109 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1111x Integrated Services Router Search vendor "Cisco" for product "1111x Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 111x Integrated Services Router Search vendor "Cisco" for product "111x Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1120 Integrated Services Router Search vendor "Cisco" for product "1120 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 1160 Integrated Services Router Search vendor "Cisco" for product "1160 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4221 Integrated Services Router Search vendor "Cisco" for product "4221 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4321 Integrated Services Router Search vendor "Cisco" for product "4321 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4331 Integrated Services Router Search vendor "Cisco" for product "4331 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4351 Integrated Services Router Search vendor "Cisco" for product "4351 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4431 Integrated Services Router Search vendor "Cisco" for product "4431 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4451-x Integrated Services Router Search vendor "Cisco" for product "4451-x Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | 4461 Integrated Services Router Search vendor "Cisco" for product "4461 Integrated Services Router" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1001-hx Search vendor "Cisco" for product "Asr 1001-hx" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1001-x Search vendor "Cisco" for product "Asr 1001-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1002-hx Search vendor "Cisco" for product "Asr 1002-hx" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1002-x Search vendor "Cisco" for product "Asr 1002-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1004 Search vendor "Cisco" for product "Asr 1004" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1006 Search vendor "Cisco" for product "Asr 1006" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1006-x Search vendor "Cisco" for product "Asr 1006-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1009-x Search vendor "Cisco" for product "Asr 1009-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1013 Search vendor "Cisco" for product "Asr 1013" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Search vendor "Cisco" for product "Ios Xe" | - | - |
Affected
| in | Cisco Search vendor "Cisco" | Cloud Services Router 1000v Search vendor "Cisco" for product "Cloud Services Router 1000v" | - | - |
Safe
|