Critical severity9.8NVD Advisory· Published Feb 8, 2019· Updated Jun 17, 2026
CVE-2018-20764
CVE-2018-20764
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.
Affected products
2- Range: <=6.7.1
Patches
Vulnerability mechanics
References
1- community.helpsystems.com/knowledge-base/fox-technologies/hotfix/515/nvdVendor Advisory
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