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CVE-2021-38507

Опубликовано: 08 дек. 2021
Источник: ubuntu
Приоритет: medium
EPSS Низкий
CVSS2: 4.3
CVSS3: 6.5

Описание

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.

РелизСтатусПримечание
bionic

released

94.0+build3-0ubuntu0.18.04.1
devel

released

94.0+build3-0ubuntu1
esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

focal

released

94.0+build3-0ubuntu0.20.04.1
hirsute

released

94.0+build3-0ubuntu0.21.04.1
impish

released

94.0+build3-0ubuntu0.21.10.1
jammy

released

94.0+build3-0ubuntu1
kinetic

released

94.0+build3-0ubuntu1
lunar

released

94.0+build3-0ubuntu1

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needs-triage
devel

DNE

esm-apps/bionic

ignored

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

focal

DNE

hirsute

DNE

impish

DNE

jammy

DNE

kinetic

DNE

Показывать по

РелизСтатусПримечание
bionic

ignored

end of standard support, was needs-triage
devel

DNE

esm-apps/focal

ignored

esm-infra-legacy/trusty

DNE

esm-infra/bionic

ignored

focal

ignored

hirsute

DNE

impish

DNE

jammy

DNE

kinetic

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-infra-legacy/trusty

DNE

esm-infra/focal

ignored

focal

ignored

hirsute

DNE

impish

DNE

jammy

DNE

kinetic

DNE

lunar

DNE

Показывать по

РелизСтатусПримечание
bionic

DNE

devel

DNE

esm-apps/jammy

ignored

esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

focal

DNE

hirsute

ignored

end of life
impish

ignored

end of life
jammy

ignored

kinetic

ignored

end of life, was needs-triage

Показывать по

РелизСтатусПримечание
bionic

released

1:91.5.0+build1-0ubuntu0.18.04.1
devel

released

1:91.3.1+build1-0ubuntu1
esm-infra-legacy/trusty

DNE

esm-infra/focal

DNE

focal

released

1:91.5.0+build1-0ubuntu0.20.04.1
hirsute

ignored

end of life
impish

released

1:91.3.1+build1-0ubuntu0.21.10.1
jammy

released

1:91.3.1+build1-0ubuntu1
kinetic

released

1:91.3.1+build1-0ubuntu1
lunar

released

1:91.3.1+build1-0ubuntu1

Показывать по

EPSS

Процентиль: 55%
0.00321
Низкий

4.3 Medium

CVSS2

6.5 Medium

CVSS3

Связанные уязвимости

CVSS3: 7.5
redhat
почти 4 года назад

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.

CVSS3: 6.5
nvd
больше 3 лет назад

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.

CVSS3: 6.5
debian
больше 3 лет назад

The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a conn ...

CVSS3: 6.5
github
больше 3 лет назад

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.

CVSS3: 4.2
fstec
почти 4 года назад

Уязвимость браузера Mozilla Firefox, связанная с ошибками в настройках безопасности, позволяющая нарушителю обойти введенные ограничения безопасности

EPSS

Процентиль: 55%
0.00321
Низкий

4.3 Medium

CVSS2

6.5 Medium

CVSS3