CVE-2021-1136
Cisco IOS XR Software for Cisco 8000 Series Routers and Network Convergence System 540 Series Routers Image Verification Vulnerabilities
Severity Score
6.7
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
Multiple vulnerabilities in Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for the Cisco 8000 Series Routers could allow an authenticated, local attacker to execute unsigned code during the boot process on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.
Múltiples vulnerabilidades en los Enrutadores Cisco Network Convergence System (NCS) 540 Series, solo cuando ejecutan imágenes de software de NCS540L de Cisco IOS XR y el Software Cisco IOS XR para los Enrutadores Cisco 8000 Series podrían permitir a un atacante autenticado local ejecutar código sin firmar durante el proceso de arranque en un dispositivo afectado. Para mayor información sobre estas vulnerabilidades, consulte la sección Detalles de este aviso
*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
- 2020-11-13 CVE Reserved
- 2021-02-04 CVE Published
- 2023-03-08 EPSS Updated
- 2024-09-16 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-347: Improper Verification of Cryptographic Signature
CAPEC
References (1)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt | 2023-11-07 |
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 Xr Search vendor "Cisco" for product "Ios Xr" | < 7.0.12 Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8201 Search vendor "Cisco" for product "8201" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | < 7.0.12 Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8202 Search vendor "Cisco" for product "8202" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | < 7.0.12 Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8808 Search vendor "Cisco" for product "8808" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | < 7.0.12 Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8812 Search vendor "Cisco" for product "8812" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | < 7.0.12 Search vendor "Cisco" for product "Ios Xr" and version " < 7.0.12" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8818 Search vendor "Cisco" for product "8818" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | >= 7.1.0 < 7.2.1 Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8201 Search vendor "Cisco" for product "8201" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | >= 7.1.0 < 7.2.1 Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8202 Search vendor "Cisco" for product "8202" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | >= 7.1.0 < 7.2.1 Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8808 Search vendor "Cisco" for product "8808" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | >= 7.1.0 < 7.2.1 Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8812 Search vendor "Cisco" for product "8812" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | >= 7.1.0 < 7.2.1 Search vendor "Cisco" for product "Ios Xr" and version " >= 7.1.0 < 7.2.1" | - |
Affected
| in | Cisco Search vendor "Cisco" | 8818 Search vendor "Cisco" for product "8818" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Ios Xr Search vendor "Cisco" for product "Ios Xr" | < 7.2.1 Search vendor "Cisco" for product "Ios Xr" and version " < 7.2.1" | - |
Affected
| in | Cisco Search vendor "Cisco" | Ncs 540 Search vendor "Cisco" for product "Ncs 540" | - | - |
Safe
|