CVE-2020-27633
First published: Tue Oct 10 2023(Updated: )
In FNET 4.6.3, TCP ISNs are improperly random.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| butok FNET | =4.6.3 | |
| 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 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2020-27633?
CVE-2020-27633 has a moderate severity rating due to its potential impact on TCP connections.
How do I fix CVE-2020-27633?
To fix CVE-2020-27633, update the affected software to the latest version where the randomization of TCP ISNs is properly implemented.
What are the potential impacts of CVE-2020-27633?
The potential impacts of CVE-2020-27633 include susceptibility to TCP connection hijacking or spoofing attacks.
Which software versions are affected by CVE-2020-27633?
CVE-2020-27633 affects FNET version 4.6.3 and multiple other embedded TCP/IP stacks prior to their respective fixed versions.
Is there a workaround for CVE-2020-27633?
Currently, there is no officially recommended workaround for CVE-2020-27633 other than upgrading the software to a patched version.
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- source/ICS
- agent/software-canonical-lookup
- vendor/butok
- canonical/butok fnet
- version/butok fnet/4.6.3
- vendor/multiple
- canonical/open-iscsi
- canonical/cyclonetcp
- canonical/multiple ndktcpip, version 2.25 and prior
- 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