// For flags

CVE-2021-27250

D-Link DAP-2020 errorpage External Control of File Name Information Disclosure Vulnerability

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of D-Link DAP-2020 v1.01rc001 Wi-Fi access points. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of CGI scripts. When parsing the errorpage request parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-11856.

Esta vulnerabilidad permite a atacantes adyacentes a la red divulgar información confidencial sobre las instalaciones afectadas de los puntos de acceso Wi-Fi D-Link DAP-2020 versión v1.01rc001. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del procesamiento de scripts CGI. Cuando se analiza el parámetro de petición errorpage, el proceso no comprueba apropiadamente una ruta suministrada por el usuario antes de usarla en operaciones de archivo. Un atacante puede aprovechar esta vulnerabilidad para divulgar las credenciales almacenadas, conllevando un mayor compromiso. Era ZDI-CAN-11856

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of D-Link DAP-2020 Wi-Fi access points. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of CGI scripts. When parsing the errorpage request parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise.

*Credits: SUID
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-02-16 CVE Reserved
  • 2021-02-24 CVE Published
  • 2023-12-29 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-73: External Control of File Name or Path
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Dlink
Search vendor "Dlink"
Dap-2020 Firmware
Search vendor "Dlink" for product "Dap-2020 Firmware"
1.01
Search vendor "Dlink" for product "Dap-2020 Firmware" and version "1.01"
rc001
Affected
in Dlink
Search vendor "Dlink"
Dap-2020
Search vendor "Dlink" for product "Dap-2020"
--
Safe