Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Dlink | Dap-1520 Firmware | <= 1.10b04 |
| Dlink | Dap-1520 | a1 |
Related Weaknesses (CWE)
References
- https://research.loginsoft.com/bugs/classic-stack-based-buffer-overflow-in-dlinkExploitThird Party Advisory
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP1PatchVendor Advisory
- https://research.loginsoft.com/bugs/classic-stack-based-buffer-overflow-in-dlinkExploitThird Party Advisory
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP1PatchVendor Advisory
FAQ
What is CVE-2020-15892?
CVE-2020-15892 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ...
How severe is CVE-2020-15892?
CVE-2020-15892 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-15892?
Check the references section above for vendor advisories and patch information. Affected products include: Dlink Dap-1520 Firmware, Dlink Dap-1520.