VulnerabilityModified
CVE-2020-27630
In Silicon Labs uC/TCP-IP 3.6.0, TCP ISNs are improperly random.
CRITICAL 9.8EPSS 1.08%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Silicon Labs uC/TCP-IP 3.6.0, TCP ISNs are improperly random.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.08% probability · 63th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-330
- Affected
- silabs/uc\/tcp-ip
- Source
- cve@mitre.org
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01Third Party Advisory, US Government Resource
- https://www.forescout.comThird Party Advisory
- https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/Third Party Advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01Third Party Advisory, US Government Resource
- https://www.forescout.comThird Party Advisory
- https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.