Description
An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-10-05, as used in COVID-19 applications on Android and iOS. The encrypted metadata block with a TX value lacks a checksum, allowing bitflipping to amplify a contamination attack. This can cause metadata deanonymization and risk-score inflation. NOTE: the vendor's position is "We do not believe that TX power authentication would be a useful defense against relay attacks.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
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References
History
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-04T15:19:09.383Z
Reserved: 2020-08-27T00:00:00.000Z
Link: CVE-2020-24722
No data.
Status : Modified
Published: 2020-10-07T15:15:12.553
Modified: 2024-11-21T05:15:58.240
Link: CVE-2020-24722
No data.
OpenCVE Enrichment
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Weaknesses