Unrated severityNVD Advisory· Published Oct 7, 2020· Updated Aug 4, 2024
CVE-2020-24722
CVE-2020-24722
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Google/Apple/Exposure Notifications protocoldescription
Patches
Vulnerability mechanics
References
4- packetstormsecurity.com/files/159496/GAEN-Protocol-Metadata-Deanonymization-Risk-Score-Inflation.htmlmitrex_refsource_MISC
- seclists.org/fulldisclosure/2020/Oct/12mitrex_refsource_MISC
- blog.google/inside-google/company-announcements/update-exposure-notificationsmitrex_refsource_MISC
- github.com/google/exposure-notifications-internals/blob/main/en-risks-and-mitigations-faq.mdmitrex_refsource_MISC
News mentions
0No linked articles in our index yet.