VULNERABILITY INTELLIGENCE

CVE-2018-20764

CVSS score9.8 CRITICAL
EPSS probability1.19%
CISA KEVNot currently listed
Published2019-02-08
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

A buffer overflow exists in HelpSystems tcpcrypt on Linux, used for BoKS encrypted telnet through BoKS version 6.7.1. Since tcpcrypt is setuid, exploitation leads to privilege escalation.

Primary references