CVE-2020-10071

Insufficient publish message length validation in MQTT

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Published Jun 5, 2020 CVSS 3.1 · 9 Critical EPSS 3.4% KEV · Not listed

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

zephyrproject-rtos

zephyr

affected

Version	Status	Constraints
`2.2.0`	affected	< unspecified

Configuration 1 [-]

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 3.4% (3.395% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071
https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082
https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86

History

No history.

Subscriptions

Zephyrproject Zephyr

Weaknesses

Sources

CVE record Updated: Sep 17, 2024, 4:19 AM

Status: PUBLISHED
Assigner: zephyr
Published: Jun 5, 2020, 5:37 PM
Updated: Sep 17, 2024, 4:19 AM
Reserved: Mar 4, 2020, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 2:47 AM

Status: Modified
Published: Jun 5, 2020, 6:15 PM
Modified: Jun 17, 2026, 2:47 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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