// For flags

CVE-2019-15261

Cisco Aironet Access Points Point-to-Point Tunneling Protocol Denial of Service Vulnerability

Severity Score

8.6
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A vulnerability in the Point-to-Point Tunneling Protocol (PPTP) VPN packet processing functionality in Cisco Aironet Access Points (APs) could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Generic Routing Encapsulation (GRE) frames that pass through the data plane of an affected AP. An attacker could exploit this vulnerability by associating to a vulnerable AP, initiating a PPTP VPN connection to an arbitrary PPTP VPN server, and sending a malicious GRE frame through the data plane of the AP. A successful exploit could allow the attacker to cause an internal process of the targeted AP to crash, which in turn would cause the AP to reload. The AP reload would cause a DoS condition for clients that are associated with the AP.

Una vulnerabilidad en la funcionalidad de procesamiento de paquetes Point-to-Point Tunneling Protocol (PPTP) VPN en Cisco Aironet Access Points (APs), podría permitir a un atacante remoto no autenticado causar la recarga de un dispositivo afectado, resultando en una condición de denegación de servicio (DoS). La vulnerabilidad es debido a una comprobación insuficiente de las tramas Generic Routing Encapsulation (GRE) que pasan por medio del plano de datos de un AP afectado. Un atacante podría explotar esta vulnerabilidad al asociarse en un AP vulnerable, iniciar una conexión VPN PPTP a un servidor VPN PPTP arbitrario y enviar una trama GRE maliciosa por medio del plano de datos del AP. Una explotación con éxito podría permitir al atacante causar que un proceso interno del AP objetivo se bloquee, lo que a su vez causaría que el AP se recargue. La recarga AP provocaría una condición DoS para los clientes que están asociados con el AP.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2019-08-20 CVE Reserved
  • 2019-10-16 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-11-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
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"
Aironet 1810 Firmware
Search vendor "Cisco" for product "Aironet 1810 Firmware"
>= 8.4 < 8.5.151.0
Search vendor "Cisco" for product "Aironet 1810 Firmware" and version " >= 8.4 < 8.5.151.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1810
Search vendor "Cisco" for product "Aironet 1810"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1810 Firmware
Search vendor "Cisco" for product "Aironet 1810 Firmware"
>= 8.8 < 8.8.125.0
Search vendor "Cisco" for product "Aironet 1810 Firmware" and version " >= 8.8 < 8.8.125.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1810
Search vendor "Cisco" for product "Aironet 1810"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1810 Firmware
Search vendor "Cisco" for product "Aironet 1810 Firmware"
>= 8.9 < 8.9.111.0
Search vendor "Cisco" for product "Aironet 1810 Firmware" and version " >= 8.9 < 8.9.111.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1810
Search vendor "Cisco" for product "Aironet 1810"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1830 Firmware
Search vendor "Cisco" for product "Aironet 1830 Firmware"
>= 8.4 < 8.5.151.0
Search vendor "Cisco" for product "Aironet 1830 Firmware" and version " >= 8.4 < 8.5.151.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1830
Search vendor "Cisco" for product "Aironet 1830"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1830 Firmware
Search vendor "Cisco" for product "Aironet 1830 Firmware"
>= 8.8 < 8.8.125.0
Search vendor "Cisco" for product "Aironet 1830 Firmware" and version " >= 8.8 < 8.8.125.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1830
Search vendor "Cisco" for product "Aironet 1830"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1830 Firmware
Search vendor "Cisco" for product "Aironet 1830 Firmware"
>= 8.9 < 8.9.111.0
Search vendor "Cisco" for product "Aironet 1830 Firmware" and version " >= 8.9 < 8.9.111.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1830
Search vendor "Cisco" for product "Aironet 1830"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1850 Firmware
Search vendor "Cisco" for product "Aironet 1850 Firmware"
>= 8.4 < 8.5.151.0
Search vendor "Cisco" for product "Aironet 1850 Firmware" and version " >= 8.4 < 8.5.151.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1850
Search vendor "Cisco" for product "Aironet 1850"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1850 Firmware
Search vendor "Cisco" for product "Aironet 1850 Firmware"
>= 8.8 < 8.8.125.0
Search vendor "Cisco" for product "Aironet 1850 Firmware" and version " >= 8.8 < 8.8.125.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1850
Search vendor "Cisco" for product "Aironet 1850"
--
Safe
Cisco
Search vendor "Cisco"
Aironet 1850 Firmware
Search vendor "Cisco" for product "Aironet 1850 Firmware"
>= 8.9 < 8.9.111.0
Search vendor "Cisco" for product "Aironet 1850 Firmware" and version " >= 8.9 < 8.9.111.0"
-
Affected
in Cisco
Search vendor "Cisco"
Aironet 1850
Search vendor "Cisco" for product "Aironet 1850"
--
Safe