Which products and versions are affected by CVE-2019-17662?

Affected: Thinvnc (Cybelsoft) versions 1.0-b1. The full list is in the CVE brief.

Is CVE-2019-17662 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since Oct 16, 2019.

Is CVE-2019-17662 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2019-17662?

Public exploit code is available.

Is there a fix for CVE-2019-17662?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2019-17662 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2019-17662

CriticalExploitedPublic exploit

ThinVNC 1.0b1 is vulnerable to arbitrary file read, which leads to a compromise of the VNC server.

Published Oct 16, 2019 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2019-17662 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Thinvnc (Cybelsoft).
It is exploited in the wild, listed in Industry KEV feed since Oct 16, 2019. Public exploit code is available.
EPSS estimates a 97% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

97%

Higher than 99.8% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2019-17662 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Oct 16, 2019	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
ThinvncCybelsoft	1.0-b1	n/a

Timeline

Publicly disclosed
Oct 16, 2019
Added to Industry KEV feed
Oct 16, 2019
Last updated
Nov 21, 2024

Weakness Type

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-522 Insufficiently Protected Credentials

References

advisoryhttps://github.com/bewest/thinvnc/issues/5
exploithttp://packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.html
exploitVulnCheck exploitation report
exploithttps://redteamzone.com/ThinVNC/
exploitExploitDB-47519

1 more references in the full CVE brief

FAQ

Common Questions.

ThinVNC 1.0b1 is vulnerable to arbitrary file read, which leads to a compromise of the VNC server.
Affected: Thinvnc (Cybelsoft) versions 1.0-b1. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 16, 2019.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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