CVE-2020-10063 — A remote adversary with the ability to send arbitrary CoAP packets to be parsed

A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

01What is this vulnerability?

A remote adversary with the ability to send arbitrary CoAP packets to be parsed by Zephyr is able to cause a denial of service. This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

02Affected products

Vendor	Product	Versions
zephyrproject-rtos	zephyr	2.2.0, 2.1.0, 1.14.0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-06-05T17:37:37.314Z
• Last modified: 2024-09-17T04:03:51.040Z

09References

• zephyrprojectsec.atlassian.net — https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-55
• docs.zephyrproject.org — https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-100…
• github.com — https://github.com/zephyrproject-rtos/zephyr/pull/24435
• github.com — https://github.com/zephyrproject-rtos/zephyr/pull/24531
• github.com — https://github.com/zephyrproject-rtos/zephyr/pull/24535
• github.com — https://github.com/zephyrproject-rtos/zephyr/pull/24530