CVE-2020-15892: Buffer Overflow
First published: Wed Jul 22 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| D-link Dap-1520 Firmware | <=1.10b04 | |
| Dlink Dap-1520 | =a1 | |
| Dlink Dap-1520 Firmware | <=1.10b04 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-15892?
CVE-2020-15892 is a vulnerability discovered in apply.cgi on D-Link DAP-1520 devices before 1.10b04Beta02.
What is the severity of CVE-2020-15892?
The severity of CVE-2020-15892 is critical with a CVSS score of 9.8.
How does CVE-2020-15892 affect D-Link DAP-1520 devices?
CVE-2020-15892 allows attackers to execute arbitrary code on D-Link DAP-1520 devices.
How can I fix CVE-2020-15892?
To fix CVE-2020-15892, users should update their D-Link DAP-1520 firmware to version 1.10b04Beta02 or later.
Are there any additional references for CVE-2020-15892?
Yes, you can find additional information about CVE-2020-15892 at the following links: [Research Loginsoft](https://research.loginsoft.com/bugs/classic-stack-based-buffer-overflow-in-dlink-firmware-dap-1520/) and [D-Link Support Announcement](https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10169).
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