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ubuntucveUbuntu.comUB:CVE-2019-17023
HistoryJan 08, 2020 - 12:00 a.m.

CVE-2019-17023

2020-01-0800:00:00
ubuntu.com
ubuntu.com
12

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.003 Low

EPSS

Percentile

69.3%

After a HelloRetryRequest has been sent, the client may negotiate a lower
protocol that TLS 1.3, resulting in an invalid state transition in the TLS
State Machine. If the client gets into this state, incoming Application
Data records will be ignored. This vulnerability affects Firefox < 72.

Bugs

Notes

Author Note
mdeslaur nss in xenial is built with NSS_DISABLE_TLS_1_3, so this issue doesn’t affect it.
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchfirefox< 72.0.1+build1-0ubuntu0.18.04.1UNKNOWN
ubuntu19.04noarchfirefox< 72.0.1+build1-0ubuntu0.19.04.1UNKNOWN
ubuntu19.10noarchfirefox< 72.0.1+build1-0ubuntu0.19.10.1UNKNOWN
ubuntu20.04noarchfirefox< 72.0.1+build1-0ubuntu1UNKNOWN
ubuntu16.04noarchfirefox< 72.0.1+build1-0ubuntu0.16.04.1UNKNOWN
ubuntu18.04noarchnss< 2:3.35-2ubuntu2.8UNKNOWN
ubuntu19.10noarchnss< 2:3.45-1ubuntu2.3UNKNOWN

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.003 Low

EPSS

Percentile

69.3%

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