Description
The Zephyr MQTT parsing code performs insufficient checking of the length field on publish messages, allowing a buffer overflow and potentially remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
References (4)
Core 4
Core References
Third Party Advisory x_refsource_misc
https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment
Third Party Advisory x_refsource_misc
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86
Vendor Advisory x_refsource_misc
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071
Patch, Third Party Advisory x_refsource_misc
https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082
Scores
CVSS v3
9.0
EPSS
0.1390
EPSS Percentile
94.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Details
CWE
CWE-129
CWE-120
Status
published
Products (1)
zephyrproject/zephyr
< 2.2.0
Published
Jun 05, 2020
Tracked Since
Feb 18, 2026