Critical severity · published Jun 5, 2020
CVE-2020-10071
The Zephyr MQTT parsing code performs insufficient checking of the length field on publish messages, allowing a buffer overflow and potentially remote code execution
9.8
CVSS
3.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.4% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZE
Zephyr · Zephyrproject
through 2.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-10071
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-10071
Vendor Advisory
https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071
Patch
https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082
Third Party Advisory
https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment
Third Party Advisory
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86
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