CVE-2020-10070: zephyrproject-rtos zephyr Classic Buffer Overflow
CVSS: 9.8v3.1CriticalModified
Published 05-06-2020Last modified 16-09-2024
Vulnerability summary
CVE-2020-10070 is a critical (CVSS 9.8) Classic Buffer Overflow vulnerability in zephyrproject-rtos zephyr. EPSS estimates a 2.88% chance of exploitation in the next 30 days, higher than 86.6% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
2.88%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-06-2020PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
In the Zephyr Project MQTT code, improper bounds checking can result in memory corruption and possibly remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 9.0–9.8
- CVE.orgCNA9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HDiffers
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.88%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.88% on 20-09-2026
20-09-202620-10-2026
EPSS score2.88%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
Affected systems
2 vendors · 2 products
References
4 links- research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessmentX Refsource MISCThird Party Advisory
- github.com/zephyrproject-rtos/zephyr/pull/23821/commits/0b39cbf3c01d7feec9d0dd7cc7e0e374b6113542X Refsource MISCPatchThird Party Advisory