CVE-2018-20764 Memory corruption in n/a
A buffer overflow in the setuid tcpcrypt binary allows local attackers to execute arbitrary code and escalate privileges on Linux systems using BoKS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-20764?
CVE-2018-20764 is a critical memory corruption vulnerability in n/a, published on 8 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2018-20764?
It affects 1 product.
Products include Helpsystems Boks.
How do I fix CVE-2018-20764?
No fix has been published for CVE-2018-20764 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-20764 being exploited?
There is no known exploitation of CVE-2018-20764 in the wild and no public exploit code.
Sources
Also known as GHSA-45g7-3c3h-rm3p.