// For flags

CVE-2022-20737

Cisco Adaptive Security Appliance Software Clientless SSL VPN Heap Overflow Vulnerability

Severity Score

7.1
*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 handler for HTTP authentication for resources accessed through the Clientless SSL VPN portal of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device or to obtain portions of process memory from an affected device. This vulnerability is due to insufficient bounds checking when parsing specific HTTP authentication messages. An attacker could exploit this vulnerability by sending malicious traffic to an affected device acting as a VPN Gateway. To send this malicious traffic, an attacker would need to control a web server that can be accessed through the Clientless SSL VPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition, or to retrieve bytes from the device process memory that may contain sensitive information.

Una vulnerabilidad en el administrador de la autenticación HTTP para los recursos a los que se accede a través del portal Clientless SSL VPN del software Cisco Adaptive Security Appliance (ASA) podría permitir a un atacante remoto autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado u obtuviera partes de la memoria del proceso de un dispositivo afectado. Esta vulnerabilidad es debido a una comprobación insuficiente de los límites cuando son analizados determinados mensajes de autenticación HTTP. Un atacante podría explotar esta vulnerabilidad mediante el envío de tráfico malicioso a un dispositivo afectado que actúe como puerta de enlace VPN. Para enviar este tráfico malicioso, un atacante necesitaría controlar un servidor web al que pueda accederse mediante el portal Clientless SSL VPN. Una explotación con éxito podría permitir al atacante causar la recarga del dispositivo, resultando en una condición DoS, o recuperar bytes de la memoria de proceso del dispositivo que podrían contener información confidencial

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
Partial
Integrity
None
Availability
Complete
* 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
  • 2022-05-03 CVE Published
  • 2023-11-23 EPSS Updated
  • 2024-11-06 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-122: Heap-based Buffer Overflow
  • CWE-787: Out-of-bounds Write
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"
 Adaptive Security Appliance Software
Search vendor "Cisco" for product "Adaptive Security Appliance Software"
 < 9.12.4.38
Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " < 9.12.4.38"
-
Affected
Cisco
Search vendor "Cisco"
 Adaptive Security Appliance Software
Search vendor "Cisco" for product "Adaptive Security Appliance Software"
 >= 9.13.0 < 9.14.4
Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.13.0 < 9.14.4"
-
Affected
Cisco
Search vendor "Cisco"
 Adaptive Security Appliance Software
Search vendor "Cisco" for product "Adaptive Security Appliance Software"
 >= 9.15.0 < 9.15.1.21
Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.15.0 < 9.15.1.21"
-
Affected
Cisco
Search vendor "Cisco"
 Adaptive Security Appliance Software
Search vendor "Cisco" for product "Adaptive Security Appliance Software"
 >= 9.16.0 < 9.16.2.14
Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.16.0 < 9.16.2.14"
-
Affected
Cisco
Search vendor "Cisco"
 Adaptive Security Appliance Software
Search vendor "Cisco" for product "Adaptive Security Appliance Software"
 >= 9.17.0 < 9.17.1.7
Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.17.0 < 9.17.1.7"
-
Affected