// For flags

CVE-2019-15262

Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability

Severity Score

7.5
*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 Secure Shell (SSH) session management for Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the SSH process is not properly deleted when an SSH connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly opening SSH connections to an affected device. A successful exploit could allow the attacker to exhaust system resources by initiating multiple SSH connections to the device that are not effectively terminated, which could result in a DoS condition.

Una vulnerabilidad en la gestión de sesión de Secure Shell (SSH) para Cisco Wireless LAN Controller (WLC) Software, podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad se presenta porque el proceso SSH no se elimina apropiadamente cuando una conexión con el dispositivo SSH es desconectada. Un atacante podría explotar esta vulnerabilidad al abrir de manera repetitiva las conexiones SSH en un dispositivo afectado. Una explotación con éxito podría permitir al atacante agotar los recursos del sistema iniciando múltiples conexiones SSH en el dispositivo que no son finalizadas de forma efectiva, lo que podría resultar en una condición DoS.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
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
  • 2023-03-07 EPSS Updated
  • 2024-11-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-404: Improper Resource Shutdown or Release
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"
 5520 Wireless Lan Controller Firmware
Search vendor "Cisco" for product "5520 Wireless Lan Controller Firmware"
 <= 8.5.140.0
Search vendor "Cisco" for product "5520 Wireless Lan Controller Firmware" and version " <= 8.5.140.0"
-
Affected
in Cisco
Search vendor "Cisco"
 5520 Wireless Lan Controller
Search vendor "Cisco" for product "5520 Wireless Lan Controller"
--
Safe
Cisco
Search vendor "Cisco"
 5508 Wireless Lan Controller Firmware
Search vendor "Cisco" for product "5508 Wireless Lan Controller Firmware"
 <= 8.5.140.0
Search vendor "Cisco" for product "5508 Wireless Lan Controller Firmware" and version " <= 8.5.140.0"
-
Affected
in Cisco
Search vendor "Cisco"
 5508 Wireless Lan Controller
Search vendor "Cisco" for product "5508 Wireless Lan Controller"
--
Safe