cve/2018/CVE-2018-20764.md

### [CVE-2018-20764](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20764)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### 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.

### POC

#### Reference
- https://community.helpsystems.com/knowledge-base/fox-technologies/hotfix/515/

#### Github
No PoCs found on GitHub currently.