CVE-2020-15632

D-Link DIR-842 HNAP GetCAPTCHAsetting Authentication Bypass Vulnerability

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-842 3.13B05 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of HNAP GetCAPTCHAsetting requests. The issue results from the lack of proper handling of sessions. An attacker can leverage this vulnerability to execute arbitrary code in the context of the device. Was ZDI-CAN-10083.

Esta vulnerabilidad permite a atacantes adyacentes a la red omitir la autenticación en las instalaciones afectadas de los enrutadores D-Link DIR-842 3.13B05. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del procesamiento de las peticiones HNAP GetCAPTCHAsetting. El problema resulta de una falta de manejo apropiado de las sesiones. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código arbitrario en el contexto del dispositivo. Fue ZDI-CAN-10083

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-842 routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of HNAP GetCAPTCHAsetting requests. The issue results from the lack of proper handling of sessions. An attacker can leverage this vulnerability to execute arbitrary code in the context of the device.

*Credits: chung96vn - Security Researcher of VinCSS (Member of Vingroup)

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-07-07 CVE Reserved
2020-07-20 CVE Published
2024-07-30 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-303: Incorrect Implementation of Authentication Algorithm

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-20-880	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10184	2020-07-28

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Dlink Search vendor "Dlink"	Dir-842 Firmware Search vendor "Dlink" for product "Dir-842 Firmware"	<= 3.13b09 Search vendor "Dlink" for product "Dir-842 Firmware" and version " <= 3.13b09"	-	Affected	in	Dlink Search vendor "Dlink"	Dir-842 Search vendor "Dlink" for product "Dir-842"	c Search vendor "Dlink" for product "Dir-842" and version "c"	-	Safe