Buffer overflow in Zephyrproject Zephyr
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. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000
Affected products
- Zephyrproject Zephyr
- Zephyrproject-Rtos Zephyr — versions 2.2.0
Weakness classification (CWE)
References
- research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-as… (Third Party Advisory)
- zephyrprojectsec.atlassian.net/browse/ZEPSEC-86 (Third Party Advisory)
- docs.zephyrproject.org/latest/security/vulnerabilities.html (Vendor Advisory)
- github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe47… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-10071?
- CVE-2020-10071 is a critical-severity vulnerability in Zephyrproject Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.0/10. Published 2020-06-05.
- How severe is CVE-2020-10071?
- Critical severity. CVSS v3 base score is 9.0 out of 10.