CVE-2018-11567 Information

Description

LICENSE README.md cvefilelist cvelist nvdcve nvdpages.sh scripts test-CVE-2017-1882.markdown test-CVE-2017-18822.markdown tmpvendorlinks DISPUTED LICENSE README.md cvefilelist cvelist nvdcve nvdpages.sh scripts test-CVE-2017-1882.markdown test-CVE-2017-18822.markdown tmpvendorlinks Prior to 2018-04-27 the reprompt feature in Amazon Echo devices could be misused by a custom Alexa skill. The reprompt feature is designed so that if Alexa does not receive an input within 8 seconds the device can speak a reprompt then wait an additional 8 seconds for input; if the user still does not respond the microphone is then turned off. The vulnerability involves empty output-speech reprompts custom wildcard (\gibberish) input slots and logging of detected speech. If a maliciously designed skill is installed an attacker could obtain transcripts of speech not intended for Alexa to process but simply spoken within the device’s hearing range. NOTE: The vendor states \Customer trust is important to us and we take security and privacy seriously. We have put mitigations in place for detecting this type of skill behavior and reject or suppress those skills when we do. Customers do not need to take any action for these mitigations to work.\

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Reference

https://info.checkmarx.com/hubfs/Amazon_Echo_Research.pdf https://www.checkmarx.com/2018/04/25/eavesdropping-with-amazon-alexa/ https://www.wired.com/story/amazon-echo-alexa-skill-spying/ https://www.yahoo.com/news/amazon-alexa-bug-let-hackers-104609600.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

3.3