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.
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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T15:19:09.383Z

Reserved: 2020-08-27T00:00:00

Link: CVE-2020-24722

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-10-07T15:15:12.553

Modified: 2024-11-21T05:15:58.240

Link: CVE-2020-24722

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses