Design/Logic Flaw

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...

CVE-2020-24722

The CVE-2020-24722 issue affects GAEN (Google/Apple Exposure Notifications) protocol used by COVID-19 apps on Android and iOS. The encrypted metadata block with a TX value lacks a checksum, allowing bitflipping to amplify a contamination attack, which can lead to metadata deanonymization and risk...