Уязвимость Opportunistic Encryption в HTTP/2, приводящая к ошибке определения источника
Описание
Функция Opportunistic Encryption в HTTP/2 (RFC 8164) позволяет прозрачное обновление соединения до TLS при сохранении свойств HTTP-соединения, включая одинаковый источник с нешифрованными соединениями на порту 80. Однако, если второй зашифрованный порт на том же IP-адресе (например, порт 8443) не поддерживает Opportunistic Encryption, сетевой злоумышленник мог перенаправить соединение браузера с порта 443 на порт 8443. Это приводило к тому, что браузер воспринимал содержимое порта 8443 как того же источника, что и HTTP.
Для устранения проблемы функция Opportunistic Encryption была отключена из-за её низкого уровня использования.
Затронутые версии ПО
- Firefox версий до 94
- Thunderbird версий до 91.3
- Firefox ESR версий до 91.3
Тип уязвимости
Подмена соединения
Ссылки
- Issue TrackingPermissions RequiredVendor Advisory
- Mailing ListThird Party Advisory
- Mailing ListThird Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Vendor Advisory
- Vendor Advisory
- Vendor Advisory
- Issue TrackingPermissions RequiredVendor Advisory
- Mailing ListThird Party Advisory
- Mailing ListThird Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Third Party Advisory
- Vendor Advisory
- Vendor Advisory
- Vendor Advisory
Уязвимые конфигурации
Одно из
Одно из
EPSS
6.5 Medium
CVSS3
4.3 Medium
CVSS2
Дефекты
Связанные уязвимости
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a conn ...
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Уязвимость браузера Mozilla Firefox, связанная с ошибками в настройках безопасности, позволяющая нарушителю обойти введенные ограничения безопасности
EPSS
6.5 Medium
CVSS3
4.3 Medium
CVSS2