// For flags

CVE-2021-1623

Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Simple Network Management Protocol Denial of Service Vulnerability

Severity Score

7.7
*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 Simple Network Management Protocol (SNMP) punt handling function of Cisco cBR-8 Converged Broadband Routers could allow an authenticated, remote attacker to overload a device punt path, resulting in a denial of service (DoS) condition. This vulnerability is due to the punt path being overwhelmed by large quantities of SNMP requests. An attacker could exploit this vulnerability by sending a large number of SNMP requests to an affected device. A successful exploit could allow the attacker to overload the device punt path, resulting in a DoS condition.

Una vulnerabilidad en la función punt handling de Simple Network Management Protocol (SNMP) de Cisco cBR-8 Converged Broadband Routers podría permitir a un atacante remoto autenticado sobrecargar la ruta de punt del dispositivo, resultando en una condición de denegación de servicio (DoS). Esta vulnerabilidad es debido a que la ruta de búsqueda está sobrecargada por grandes cantidades de peticiones SNMP. Un atacante podría explotar esta vulnerabilidad mediante el envío de un gran número de peticiones SNMP a un dispositivo afectado. Una explotación con éxito podría permitir al atacante sobrecargar la ruta de búsqueda del dispositivo, resultando en una condición de DoS

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-11-13 CVE Reserved
  • 2021-09-23 CVE Published
  • 2023-04-15 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-399: Resource Management Errors
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"
 < 17.6.1a
Search vendor "Cisco" for product "Ios Xe" and version " < 17.6.1a"
-
Affected
in Cisco
Search vendor "Cisco"
 Cbr-8
Search vendor "Cisco" for product "Cbr-8"
--
Safe