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CVE-2020-12270

MEDIUM
6.5
CVSS Score
Published: April 27, 2020 at 03:26 AM UTC
Updated: June 17, 2026 at 02:51 AM UTC
1 product affected across 1 vendorBluezone

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%

Description

React Native Bluetooth Scan in Bluezone 1.0.0 uses six-character alphanumeric IDs, which might make it easier for remote attackers to interfere with COVID-19 contact tracing by using many IDs. NOTE: the vendor disputes the relevance of this report because the recipient of an F1 alert will know it was a false alert if contact-history comparison fails (i.e., an F0 is not actually part of the contact history obtained from the device of this recipient, or this recipient is not actually part of the contact history obtained from the device of an F0)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

x_refsource_MISC
Source: [email protected]
https://bluezone.ai/CVE
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/BluezoneGlobal/bluezone-app/blob/afa15fcec391f0edc51d0486a4ca84dd2520bbb3/CHANGELOG.md
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/BluezoneGlobal/bluezone-app/blob/afa15fcec391f0edc51d0486a4ca84dd2520bbb3/package.json#L27
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/BluezoneGlobal/react-native-bluetooth-scan/blob/d9ee70fd594093a30e50b6e62a7593a8397c2dab/lib/android/src/main/AndroidManifest.xml#L11-L12
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/BluezoneGlobal/react-native-bluetooth-scan/blob/d9ee70fd594093a30e50b6e62a7593a8397c2dab/lib/android/src/main/java/com/scan/BluezonerIdGenerator.java#L18-L28
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/BluezoneGlobal/react-native-bluetooth-scan/blob/d9ee70fd594093a30e50b6e62a7593a8397c2dab/lib/android/src/main/java/com/scan/TraceCovidModule.java#L98
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://vnhacker.blogspot.com/2020/04/vietnams-contact-tracing-app_26.html

CVSS

6.5MEDIUM[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-330

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