Vulnerability CVE-2021-27941
Published: 2021-05-06   Modified: 2021-05-07

Description:
Unconstrained Web access to the device's private encryption key in the QR code pairing mode in the eWeLink mobile application (through 4.9.2 on Android and through 4.9.1 on iOS) allows a physically proximate attacker to eavesdrop on Wi-Fi credentials and other sensitive information by monitoring the Wi-Fi spectrum during a device pairing process.

Type:

CWE-863

 (Incorrect Authorization)

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Coolkit -> Ewelink 

 References:
https://github.com/salgio/eWeLink-QR-Code
https://apps.apple.com/us/app/ewelink-smart-home/id1035163158
https://play.google.com/store/apps/details?id=com.coolkit&hl=en_US
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