MEDIUM
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
Published Oct 7, 2020
5.9
MEDIUMCVSS 3.1
EPSS 2.46%
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.
Affected products
No data.
OR
- ≤ 2020-10-05
- ≤ 2020-10-05
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (5)
- http://packetstormsecurity.com/files/159496/GAEN-Protocol-Metadata-Deanonymization-Risk-Score-Inflation.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2020/Oct/12 x_refsource_MISCExploitMailing ListThird Party Advisory
- https://blog.google/inside-google/company-announcements/update-exposure-notifications x_refsource_MISCThird Party Advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-17433 Advisory
- https://github.com/google/exposure-notifications-internals/blob/main/en-risks-and-mitigations-faq.md#additional-considerations x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/159496/GAEN-Protocol-Metadata-Deanonymization-Risk-Score-Inflation.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| http://seclists.org/fulldisclosure/2020/Oct/12 | x_refsource_MISCExploitMailing ListThird Party Advisory | |
| https://blog.google/inside-google/company-announcements/update-exposure-notifications | x_refsource_MISCThird Party Advisory | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-17433 | Advisory | |
| https://github.com/google/exposure-notifications-internals/blob/main/en-risks-and-mitigations-faq.md#additional-considerations | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 7, 2020
Updated Aug 4, 2024
Reserved Aug 27, 2020
Link CVE-2020-24722
CISA Vulnrichment
No data
Red Hat
No data
GitHub
No data