Improper input validation in Shenzhen Dragon Brothers Fb50
CVE-2019-13143
An HTTP parameter pollution issue was discovered on Shenzhen Dragon Brothers Fingerprint Bluetooth Round Padlock FB50 2.3. With the user ID, user name, and the lock's MAC address, anyone can unbind the existing owner of the lock, and bind themselves instead. This leads to complete takeover of the lock. The user ID, name, and MAC address are trivially obtained from APIs found within the Android or iOS application. With only the MAC address of the lock, any attacker can transfer ownership of the lock from the current user, over to the attacker's account. Thus rendering the lock completely inaccessible to the current user.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.securelayer7.net/fb50-smart-lock-vulnerability-disclosure/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-13143?
- CVE-2019-13143 is a critical-severity vulnerability in Shenzhen Dragon Brothers Fb50, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2019-08-06.
- How severe is CVE-2019-13143?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-13143 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.