CVE-2018-5721

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.

CVSS v3 8.8 HIGH
CVSS v2.0 6.5 MEDIUM

8.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.5^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server/	Exploit Third Party Advisory
http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server/	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:asuswrt-merlin:asuswrt-merlin:*:*:*:*:*:*:*:*

History

21 Nov 2024, 04:09

Type	Values Removed	Values Added
References	~~() http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server/ - Exploit, Third Party Advisory~~	() http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server/ - Exploit, Third Party Advisory

Information

Published : 2018-01-17 06:29

Updated : 2024-11-21 04:09

NVD link : CVE-2018-5721

Mitre link : CVE-2018-5721

CVE.ORG link : CVE-2018-5721

JSON object : View

Products Affected

asuswrt-merlin

asuswrt-merlin

CWE

CWE-787

Out-of-bounds Write

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8.8 /10