Path Traversal in Cybelsoft Thinvnc
CVE-2019-17662
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.968 (99.9th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.968 · newest: 0.968 · change: 0.000
Affected products
- Cybelsoft Thinvnc — versions 1.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- redteamzone.com/ThinVNC/ (Exploit, Third Party Advisory)
- github.com/shashankmangal2/Exploits/blob/master/ThinVNC-RemoteAccess/POC.py (Broken Link)
- github.com/bewest/thinvnc/issues/5 (Third Party Advisory)
- packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.html (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-17662?
- CVE-2019-17662 is a critical-severity vulnerability in Cybelsoft Thinvnc, classified under Path Traversal. CVSS score: 9.8/10. Published 2019-10-16.
- How severe is CVE-2019-17662?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-17662 known to be exploited?
- 38 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.