Vulnerability Details : CVE-2018-20764
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.
Vulnerability category: OverflowGain privilege
Products affected by CVE-2018-20764
- cpe:2.3:a:helpsystems:boks:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-20764
0.25%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 62 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-20764
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
References for CVE-2018-20764
-
https://community.helpsystems.com/knowledge-base/fox-technologies/hotfix/515/
Hotfix: Buffer overrun vulnerability in tcpcrypt (HFBM-0223) · Customer PortalVendor Advisory
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