// For flags

CVE-2021-1237

Cisco AnyConnect Secure Mobility Client for Windows DLL Injection Vulnerability

Severity Score

7.8
*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 Network Access Manager and Web Security Agent components of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL injection attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by inserting a configuration file in a specific path in the system which, in turn, causes a malicious DLL file to be loaded when the application starts. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges.

Una vulnerabilidad en los componentes Network Access Manager y Web Security Agent de Cisco AnyConnect Secure Mobility Client para Windows, podría permitir a un atacante local autenticado llevar a cabo un ataque de inyección de DLL. Para explotar esta vulnerabilidad, el atacante debería tener credenciales válidas en el sistema Windows. La vulnerabilidad es debido a una comprobación insuficiente de los recursos que son cargados por la aplicación en el tiempo de ejecución. Un atacante podría explotar esta vulnerabilidad insertando un archivo de configuración en una ruta específica en el sistema que, a su vez, causa que se cargue un archivo DLL malicioso cuando la aplicación se inicia. Una explotación con éxito podría permitir al atacante ejecutar código arbitrario en la máquina afectada con privilegios SYSTEM.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2020-11-13 CVE Reserved
  • 2021-01-13 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-11-12 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-427: Uncontrolled Search Path Element
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"
 Anyconnect Secure Mobility Client
Search vendor "Cisco" for product "Anyconnect Secure Mobility Client"
 < 4.9.04043
Search vendor "Cisco" for product "Anyconnect Secure Mobility Client" and version " < 4.9.04043"
windows
Affected