Main Vulnerability Database Vulnerabilities #VU39306

Input validation error in TigerVNC - CVE-2017-7394

Published: April 1, 2017 / Updated: August 8, 2020

Vulnerability identifier: #VU39306

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2017-7394

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: tigervnc.org

Affected software:
TigerVNC

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

In TigerVNC 1.7.1 (SSecurityPlain.cxx SSecurityPlain::processMsg), unauthenticated users can crash the server by sending long usernames.

Install update from vendor's website.