CVE-2020-10071
Insufficient publish message length validation in MQTT
CRITICAL
9.8
CVSS Score
Published: June 5, 2020 at 05:37 PM UTC
Updated: June 17, 2026 at 02:47 AM UTC
2 products affected across 2 vendorsZephyrZephyr
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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 2.2.0
v ≥ 2.2.02.2.0
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_MISCVendor Advisory
Source: [email protected]
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082x_refsource_MISCThird Party Advisory
Source: [email protected]
https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessmentx_refsource_MISCThird Party Advisory
Source: [email protected]
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-120CWE-129
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