A vulnerability has been found in D-Link DAP-1520 and classified as critical. This vulnerability affects an unknown function of the file apply.cgi of the component Web Interface. The manipulation of the argument log_pass as part of a Parameter leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 07/22/2020. This vulnerability was named CVE-2020-15892 since 07/22/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/23/2020).

Upgrading to version 1.10b04Beta02 eliminates this vulnerability.

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Vendor

• D-Link

Name

• DAP-1520

License

• commercial

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• 🔍

CPE 2.2info

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