CVE-2020-27634
First published: Tue Oct 10 2023(Updated: )
In Contiki 4.5, TCP ISNs are improperly random.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| open-iscsi | ||
| CycloneTCP | ||
| Multiple NDKTCPIP, Version 2.25 and prior | ||
| butok FNET | ||
| Contiki OS | ||
| uC/TCP-IP | ||
| Contiki-NG | ||
| uIP (EOL) | ||
| altran picoTCP-NG | ||
| picoTCP | ||
| MPLAB Net | ||
| Multiple Nucleus NET | ||
| Multiple Nucleus ReadyStart for ARM, MIPS, and PPC | ||
| Naranjascontocados | =4.5 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-27634?
CVE-2020-27634 is a vulnerability in Contiki 4.5 where TCP ISNs are improperly random.
How severe is CVE-2020-27634?
CVE-2020-27634 has a severity rating of 9.1 (critical).
How does CVE-2020-27634 affect Contiki-ng Contiki-ng 4.5?
CVE-2020-27634 affects Contiki-ng Contiki-ng 4.5 by improperly randomizing TCP ISNs.
How can I fix CVE-2020-27634?
To fix CVE-2020-27634, update to a patched version of Contiki-ng Contiki-ng 4.5 or apply any available security patches.
Are there any references for CVE-2020-27634?
Yes, you can find references for CVE-2020-27634 at the following links: [Link 1](https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01), [Link 2](https://www.forescout.com), [Link 3](https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/).
- agent/type
- agent/author
- agent/severity
- agent/weakness
- agent/references
- agent/description
- agent/event
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/trending
- agent/source
- agent/softwarecombine
- agent/tags
- collector/ics-cert-advisory
- source/ICS
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-api
- collector/nvd-index
- vendor/multiple
- canonical/open-iscsi
- canonical/cyclonetcp
- canonical/multiple ndktcpip, version 2.25 and prior
- canonical/butok fnet
- canonical/contiki os
- canonical/uc/tcp-ip
- canonical/contiki-ng
- canonical/uip (eol)
- canonical/altran picotcp-ng
- canonical/picotcp
- canonical/mplab net
- canonical/multiple nucleus net
- canonical/multiple nucleus readystart for arm, mips, and ppc
- vendor/contiki-ng
- canonical/naranjascontocados
- version/naranjascontocados/4.5