CVE-2020-10071: Insufficient publish message length validation in MQTT
First published: Fri Jun 05 2020(Updated: )
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.
Credit: vulnerabilities@zephyrproject.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zephyr Project Manager | <=2.2.0 |
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Reference Links
- 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
Frequently Asked Questions
What is the severity of CVE-2020-10071?
CVE-2020-10071 has a high severity rating due to its potential for buffer overflow and remote code execution.
How do I fix CVE-2020-10071?
To fix CVE-2020-10071, update to a version of Zephyr later than 2.2.0 where the vulnerability is patched.
What systems are affected by CVE-2020-10071?
CVE-2020-10071 affects Zephyr versions 2.2.0 and later.
What type of vulnerability is CVE-2020-10071?
CVE-2020-10071 is characterized as a buffer overflow vulnerability in the MQTT parsing code.
Can CVE-2020-10071 be exploited remotely?
Yes, CVE-2020-10071 can allow for remote code execution due to insufficient length field checking.
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