CVE Vulnerability

CVE-2020-15892

An issue was discovered in apply.cgi on D-Link DAP-1520 devices before 1.10b04Beta02. Whenever a user performs a login action from the web interface, the request values are being forwarded to the ssi binary. On the login page, the web interface restricts the password input field to a fixed length of 15 characters. The problem is that validation is being done on the client side, hence it can be bypassed. When an attacker manages to intercept the login request (POST based) and tampers with the vulnerable parameter (log_pass), to a larger length, the request will be forwarded to the webserver. This results in a stack-based buffer overflow. A few other POST variables, (transferred as part of the login request) are also vulnerable: html_response_page and log_user.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://research.loginsoft.com/bugs/classic-stack-based-buffer-overflow-in-dlink-firmware-dap-1520/ Exploit Third Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10169 Patch Vendor Advisory
Configurations

Configuration 1
Information

Published : 2020-07-22 07:15

Updated : 2021-07-21 11:39

NVD link : CVE-2020-15892

Mitre link : CVE-2020-15892

Products Affected
No products.
CWE
CWE-669

CWE-787