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CVE-2020-8994

An issue was discovered on XIAOMI AI speaker MDZ-25-DT 1.34.36, and 1.40.14. Attackers can get root shell by accessing the UART interface and then they can read Wi-Fi SSID or password, read the dialogue text files between users and XIAOMI AI speaker, use Text-To-Speech tools pretend XIAOMI speakers' voice achieve social engineering attacks, eavesdrop on users and record what XIAOMI AI speaker hears, delete the entire XIAOMI AI speaker system, modify system files, stop voice assistant service, start the XIAOMI AI speaker’s SSH service as a backdoor

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.8, with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 2 products from mi, from mi organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-03-05T16:15:12.143

Last Modified

2024-11-21T05:39:47.843

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.8 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-287

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	mi	mdz-25-dt_firmware	1.34.36	Yes
Operating System	mi	mdz-25-dt_firmware	1.40.14	Yes
Hardware	mi	mdz-25-dt	-	No

References

https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2020-8994.md Exploit, Third Party Advisory ([email protected])
https://www.usenix.org/sites/default/files/soups2018posters-lau.pdf Technical Description, Third Party Advisory ([email protected])
https://youtu.be/yCadG38yZW8 Exploit, Third Party Advisory ([email protected])
https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2020-8994.md Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.usenix.org/sites/default/files/soups2018posters-lau.pdf Technical Description, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://youtu.be/yCadG38yZW8 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mi's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.