// For flags

CVE-2022-20915

Cisco IOS XE Software IPv6 VPN over MPLS Denial of Service Vulnerability

Severity Score

7.4
*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 implementation of IPv6 VPN over MPLS (6VPE) with Zone-Based Firewall (ZBFW) of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling of an IPv6 packet that is forwarded from an MPLS and ZBFW-enabled interface in a 6VPE deployment. An attacker could exploit this vulnerability by sending a crafted IPv6 packet sourced from a device on the IPv6-enabled virtual routing and forwarding (VRF) interface through the affected device. A successful exploit could allow the attacker to reload the device, resulting in a DoS condition.

Una vulnerabilidad en la implementación de IPv6 VPN sobre MPLS (6VPE) con Zone-Based Firewall (ZBFW) del software Cisco IOS XE podría permitir a un atacante adyacente no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad es debido al manejo inapropiado de errores de un paquete IPv6 que es reenviado desde una interfaz MPLS y ZBFW habilitada en una implementación 6VPE. Un atacante podría explotar esta vulnerabilidad mediante el envío de un paquete IPv6 diseñado desde un dispositivo en la interfaz de enrutamiento y reenvío virtual (VRF) habilitada para IPv6 a través del dispositivo afectado. Una explotación con éxito podría permitir al atacante recargar el dispositivo, resultando en una condición de DoS

*Credits: N/A
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2021-11-02 CVE Reserved
  • 2022-10-10 CVE Published
  • 2024-04-20 EPSS Updated
  • 2024-11-01 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-115: Misinterpretation of Input
  • CWE-436: Interpretation Conflict
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"
Ios Xe
Search vendor "Cisco" for product "Ios Xe"
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Affected