9.8crit
CVE-2018-20764
A buffer overflow exists in HelpSystems tcpcrypt on Linux, used for BoKS encrypted telnet through BoKS version 6.7.1.
Published 7 y ago · modified 4 mo ago · JSON
CVSS
9.8
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.2%
percentile 68%
Public exploits
0
none known
Summary
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.
Exploit prediction (EPSS)
1.19% probability of exploitation in the next 30 days, higher than 68% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
References
- community.helpsystems.com /knowledge-base/fox-technologies/hotfix/515/ · x_refsource_CONFIRM, x_transferred
Sources
- CVE List: CVE-2018-20764
- NVD: CVE-2018-20764
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