CVE-2018-5721

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Stack-based buffer overflow in the ej_update_variables function in router/httpd/web.c on ASUS routers (when using software from https://github.com/RMerl/asuswrt-merlin) allows web authenticated attackers to execute code via a request that updates a setting. In ej_update_variables, the length of the variable action_script is not checked, as long as it includes a "_wan_if" substring.

Desbordamiento de búfer basado en pila en la función ej_update_variables en outer/httpd/web.c en routers ASUS (cuando emplean software de https://github.com/RMerl/asuswrt-merlin) permite que atacantes autenticados en la web ejecuten código mediante una petición que actualiza una configuración. En ej_update_variables, la longitud de la variable action_script no se comprueba, siempre y cuando incluya una subcadena "_wan_if".

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-01-16 CVE Reserved
2018-01-17 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Asuswrt-merlin Search vendor "Asuswrt-merlin"		Asuswrt-merlin Search vendor "Asuswrt-merlin" for product "Asuswrt-merlin"				<= 382.1_2 Search vendor "Asuswrt-merlin" for product "Asuswrt-merlin" and version " <= 382.1_2"		-		Affected