CVE-2020-27635
First published: Tue Oct 10 2023(Updated: )
In PicoTCP 1.7.0, TCP ISNs are improperly random.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| PicoTCP | =1.7.0 | |
| open-iscsi | ||
| CycloneTCP | ||
| NDKTCPIP | ||
| 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-2020-27635?
CVE-2020-27635 has a medium severity rating due to its impact on TCP session integrity.
How do I fix CVE-2020-27635?
To mitigate CVE-2020-27635, update the affected software to the latest versions that resolve the improper TCP ISN generation.
Which software versions are affected by CVE-2020-27635?
CVE-2020-27635 affects multiple software products, including PicoTCP 1.7.0 and prior, as well as various versions of Nut/Net, CycloneTCP, and NDKTCPIP.
What is the risk of exploiting CVE-2020-27635?
Exploiting CVE-2020-27635 could allow an attacker to hijack TCP connections, intercepting or injecting data into the traffic.
Is CVE-2020-27635 relevant to embedded systems?
Yes, CVE-2020-27635 is particularly relevant for embedded systems using affected TCP/IP stacks, which may be less monitored.
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- canonical/open-iscsi
- canonical/cyclonetcp
- canonical/ndktcpip
- canonical/butok fnet
- canonical/contiki os
- canonical/uc/tcp-ip
- canonical/contiki-ng
- canonical/uip (eol)
- canonical/altran picotcp-ng
- canonical/mplab net
- canonical/multiple nucleus net
- canonical/multiple nucleus readystart for arm, mips, and ppc