CVE-2020-3524
Cisco IOS XE ROM Monitor Software Vulnerability
Severity Score
6.8
*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 Cisco IOS XE ROM Monitor (ROMMON) Software for Cisco 4000 Series Integrated Services Routers, Cisco ASR 920 Series Aggregation Services Routers, Cisco ASR 1000 Series Aggregation Services Routers, and Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, physical attacker to break the chain of trust and load a compromised software image on an affected device. The vulnerability is due to the presence of a debugging configuration option in the affected software. An attacker could exploit this vulnerability by connecting to an affected device through the console, forcing the device into ROMMON mode, and writing a malicious pattern using that specific option on the device. A successful exploit could allow the attacker to break the chain of trust and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco.
Una vulnerabilidad en Cisco IOS XE ROM Monitor (ROMMON) Software para Cisco 4000 Series Integrated Services Routers, Cisco ASR 920 Series Aggregation Services Routers, Cisco ASR 1000 Series Aggregation Services Routers, y Cisco cBR-8 Converged Broadband Routers, podría permitir a un atacante físico no autenticado romper la cadena de confianza y cargar una imagen de software comprometida en un dispositivo afectado. La vulnerabilidad es debido a la presencia de una opción de configuración de depuración en el software afectado. Un atacante podría explotar esta vulnerabilidad mediante la conexión de un dispositivo afectado a mediante la consola, forzando el dispositivo al modo ROMMON y escribiendo un patrón malicioso usando esa opción específica en el dispositivo. Una explotación con éxito podría permitir al atacante romper la cadena de confianza y cargar una imagen de software comprometida en el dispositivo afectado.
*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-284: Improper Access Control
- CWE-862: Missing Authorization
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 Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
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 Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
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 Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
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 Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
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 Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-10sz-pd Search vendor "Cisco" for product "Asr-920-10sz-pd" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-12cz-a Search vendor "Cisco" for product "Asr-920-12cz-a" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-12cz-d Search vendor "Cisco" for product "Asr-920-12cz-d" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-12sz-a Search vendor "Cisco" for product "Asr-920-12sz-a" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-12sz-d Search vendor "Cisco" for product "Asr-920-12sz-d" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-20sz-m Search vendor "Cisco" for product "Asr-920-20sz-m" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-24sz-im Search vendor "Cisco" for product "Asr-920-24sz-im" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-24sz-m Search vendor "Cisco" for product "Asr-920-24sz-m" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-24tz-m Search vendor "Cisco" for product "Asr-920-24tz-m" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-4sz-a Search vendor "Cisco" for product "Asr-920-4sz-a" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr-920-4sz-d Search vendor "Cisco" for product "Asr-920-4sz-d" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 15.6\(18r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 15.6\(18r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 920u-12sz-im Search vendor "Cisco" for product "Asr 920u-12sz-im" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1000-x Search vendor "Cisco" for product "Asr 1000-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1001 Search vendor "Cisco" for product "Asr 1001" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1001-x Search vendor "Cisco" for product "Asr 1001-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1002 Search vendor "Cisco" for product "Asr 1002" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1002-x Search vendor "Cisco" for product "Asr 1002-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1004 Search vendor "Cisco" for product "Asr 1004" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1006 Search vendor "Cisco" for product "Asr 1006" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.2\(1r\) Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.2\(1r\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asr 1013 Search vendor "Cisco" for product "Asr 1013" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xe Rom Monitor Search vendor "Cisco" for product "Ios Xe Rom Monitor" | < 16.4\(1r\)s Search vendor "Cisco" for product "Ios Xe Rom Monitor" and version " < 16.4\(1r\)s" | - |
Affected
| in | Cisco Search vendor "Cisco" | Cbr8 Search vendor "Cisco" for product "Cbr8" | - | - |
Safe
|