CVE-2021-21281

Buffer overflow due to unvalidated TCP data offset

Description

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. A buffer overflow vulnerability exists in Contiki-NG versions prior to 4.6. After establishing a TCP socket using the tcp-socket library, it is possible for the remote end to send a packet with a data offset that is unvalidated. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.44%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: contiki-ng contiki-ng
Published at:
Updated at:

References

Link Tags
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-mc42-fqfr-h9fp third party advisory patch
https://github.com/contiki-ng/contiki-ng/pull/1366 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-21281?
CVE-2021-21281 has been scored as a high severity vulnerability.
How to fix CVE-2021-21281?
To fix CVE-2021-21281, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21281 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21281 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21281?
CVE-2021-21281 affects contiki-ng contiki-ng.
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