// For flags

CVE-2024-20456

 

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Cisco Secure Boot functionality and load unverified software on an affected device. To exploit this successfully, the attacker must have root-system privileges on the affected device.
This vulnerability is due to an error in the software build process. An attacker could exploit this vulnerability by manipulating the system’s configuration options to bypass some of the integrity checks that are performed during the booting process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass of the requirement to run Cisco signed images or alter the security properties of the running system.

Una vulnerabilidad en el proceso de arranque del software Cisco IOS XR podría permitir que un atacante local autenticado con altos privilegios omita la funcionalidad de arranque seguro de Cisco y cargue software no verificado en un dispositivo afectado. Para aprovechar esto con éxito, el atacante debe tener privilegios de system root en el dispositivo afectado. Esta vulnerabilidad se debe a un error en el proceso de compilación del software. Un atacante podría aprovechar esta vulnerabilidad manipulando las opciones de configuración del sistema para omitir algunas de las comprobaciones de integridad que se realizan durante el proceso de arranque. Un exploit exitoso podría permitir al atacante controlar la configuración de arranque, lo que podría permitirle eludir el requisito de ejecutar imágenes firmadas de Cisco o alterar las propiedades de seguridad del sistema en ejecución.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2023-11-08 CVE Reserved
  • 2024-07-10 CVE Published
  • 2024-07-11 EPSS Updated
  • 2024-08-01 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-732: Incorrect Permission Assignment for Critical Resource
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cisco
Search vendor "Cisco"
 Cisco IOS XR Software
Search vendor "Cisco" for product "Cisco IOS XR Software"
 24.2.1
Search vendor "Cisco" for product "Cisco IOS XR Software" and version "24.2.1"
en
Affected