CVE-2020-15633

D-Link Multiple Routers 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-867, DIR-878, and DIR-882 routers with firmware 1.20B10_BETA. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP requests. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the router. Was ZDI-CAN-10835.

Esta vulnerabilidad permite a atacantes adyacentes a la red omitir la autenticación en las instalaciones afectadas de los enrutadores D-Link DIR-867, DIR-878 y DIR-882 con versiones firmware 1.20B10_BETA. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta en el manejo de las peticiones HNAP. El problema resulta de una lógica de coincidencia de cadena incorrecta cuando se accede a páginas protegidas. Un atacante puede aprovechar esta vulnerabilidad para escalar privilegios y ejecutar código en el contexto del enrutador. Fue ZDI-CAN-10835

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of HNAP requests. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the router.

*Credits: chung96vn of Vietnam Cyber Security Center

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-288: Authentication Bypass Using an Alternate Path or Channel

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-20-881	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10186	2023-04-26

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
D-link Search vendor "D-link"	Dir-867 Firmware Search vendor "D-link" for product "Dir-867 Firmware"	<= 1.20b10 Search vendor "D-link" for product "Dir-867 Firmware" and version " <= 1.20b10"	-	Affected	in	Dlink Search vendor "Dlink"	Dir-867 Search vendor "Dlink" for product "Dir-867"	-	-	Safe
D-link Search vendor "D-link"	Dir-878 Firmware Search vendor "D-link" for product "Dir-878 Firmware"	<= 1.20b05 Search vendor "D-link" for product "Dir-878 Firmware" and version " <= 1.20b05"	-	Affected	in	Dlink Search vendor "Dlink"	Dir-878 Search vendor "Dlink" for product "Dir-878"	-	-	Safe
D-link Search vendor "D-link"	Dir-882 Firmware Search vendor "D-link" for product "Dir-882 Firmware"	-	-	Affected	in	Dlink Search vendor "Dlink"	Dir-882 Search vendor "Dlink" for product "Dir-882"	-	-	Safe