Vulnerability Details : CVE-2020-27634
In Contiki 4.5, TCP ISNs are improperly random.
Products affected by CVE-2020-27634
- cpe:2.3:o:contiki-ng:contiki-ng:4.5:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27634
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27634
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
3.9
|
5.2
|
NIST |
CWE ids for CVE-2020-27634
-
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-27634
-
https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/
Third Party Advisory
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https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01
Multiple Embedded TCP/IP Stacks (Update B) | CISAThird Party Advisory;US Government Resource
-
https://www.forescout.com
Forescout – Manage cyber risk and mitigate threats, continuously.Third Party Advisory
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