TCP/IP Stack Vulnerability in Silicon Labs Products
CVE-2020-27630

9.8CRITICAL

Key Information:

Vendor

Silabs

Status
Uc\/tcp-ip
Vendor
CVE Published:
10 October 2023

What is CVE-2020-27630?

The uC/TCP-IP version 3.6.0 from Silicon Labs features a vulnerability that arises from improper randomness in the generation of TCP Initial Sequence Numbers (ISNs). This weakness could potentially allow an attacker to predict the sequence numbers, which might assist in various attacks, including TCP session hijacking and denial-of-service scenarios. Given the use of this TCP/IP stack in embedded systems, the impact could extend to devices utilizing this software for network communication, highlighting the need for immediate awareness and remediation.

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References

https://www.forescout.com
https://www.cisa.gov/news-events/ics-advisories/icsa-21-0...
https://www.forescout.com/resources/numberjack-weak-isn-g...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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