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ubuntucveUbuntu.comUB:CVE-2019-11727
HistoryJul 11, 2019 - 12:00 a.m.

CVE-2019-11727

2019-07-1100:00:00
ubuntu.com
ubuntu.com
15

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

0.006 Low

EPSS

Percentile

78.3%

JSON

A vulnerability exists where it possible to force Network Security Services
(NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are
the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1
v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability
affects Firefox < 68.

Bugs

Notes

Author Note
mdeslaur only an issue with TLSv1.3. Releases before Bionic have no TLSv1.3 support. Bionic shipped with an incompatible TLSv1.3 draft, so likely not used.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 68.0+build3-0ubuntu0.18.04.1UNKNOWN
ubuntu18.10noarchfirefox< 68.0+build3-0ubuntu0.18.10.1UNKNOWN
ubuntu19.04noarchfirefox< 68.0+build3-0ubuntu0.19.04.1UNKNOWN
ubuntu19.10noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
ubuntu20.04noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
ubuntu20.10noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
ubuntu21.04noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
ubuntu21.10noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
ubuntu22.04noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
ubuntu22.10noarchfirefox< 68.0+build3-0ubuntu1UNKNOWN
Rows per page:
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5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

0.006 Low

EPSS

Percentile

78.3%

JSON
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