CVE-2020-24722

Опубликовано: 07 окт. 2020

Источник: nvd

CVSS3: 5.9

CVSS2: 2.6

EPSS Низкий

Описание

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.

Ссылки

http://packetstormsecurity.com/files/159496/GAEN-Protocol-Metadata-Deanonymization-Risk-Score-Inflation.html
Exploit
Third Party Advisory
VDB Entry
http://seclists.org/fulldisclosure/2020/Oct/12
Exploit
Mailing List
Third Party Advisory
https://blog.google/inside-google/company-announcements/update-exposure-notifications
Third Party Advisory
https://github.com/google/exposure-notifications-internals/blob/main/en-risks-and-mitigations-faq.md#additional-considerations
Third Party Advisory
http://packetstormsecurity.com/files/159496/GAEN-Protocol-Metadata-Deanonymization-Risk-Score-Inflation.html
Exploit
Third Party Advisory
VDB Entry
http://seclists.org/fulldisclosure/2020/Oct/12
Exploit
Mailing List
Third Party Advisory
https://blog.google/inside-google/company-announcements/update-exposure-notifications
Third Party Advisory
https://github.com/google/exposure-notifications-internals/blob/main/en-risks-and-mitigations-faq.md#additional-considerations
Third Party Advisory

Уязвимые конфигурации

Конфигурация 1

Одно из

cpe:2.3:a:exposure_notifications_project:exposure_notifications:*:*:*:*:*:android:*:*

Версия до 2020-10-05 (включая)

cpe:2.3:a:exposure_notifications_project:exposure_notifications:*:*:*:*:*:iphone_os:*:*

Версия до 2020-10-05 (включая)

EPSS

Процентиль: 54%

0.00318

Низкий

5.9 Medium

CVSS3

2.6 Low

CVSS2

Дефекты

CWE-294

Связанные уязвимости

GHSA-2gfr-hjcw-mr7q

CVSS3: 5.9

github

больше 3 лет назад

** DISPUTED ** 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."

EPSS

Процентиль: 54%

0.00318

Низкий

5.9 Medium

CVSS3

2.6 Low

CVSS2

Дефекты

CWE-294