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CVE-2019-17023

nvd nist
Published: Jan 8, 2020Modified: Jun 17, 2026

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6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Exploitability: 2.8 / Impact: 3.6
Source: NVD

Description

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.

Affected (7)

Mozilla
1 product
Firefox
Canonical
1 product
Ubuntu Linux
Debian
1 product
Debian Linux
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Firefox
Before 72.0
Configuration B
5 vulnerable
Vulnerable SoftwareAffected Versions
Canonical
Ubuntu Linux
Version 16.04
Ubuntu Linux
Version 18.04
Ubuntu Linux
Version 19.04
Ubuntu Linux
Version 19.10
Ubuntu Linux
Version 20.04
Configuration C
1 vulnerable
Vulnerable SoftwareAffected Versions
Debian Linux
Version 10.0

Related CWEs

CWE-287
Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

References (10)

Source: security@mozilla.org
Issue TrackingPermissions Required
Source: security@mozilla.org
Third Party Advisory
Source: security@mozilla.org
Third Party Advisory
Source: security@mozilla.org
Third Party Advisory
Source: security@mozilla.org
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingPermissions Required
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.