Vulnerability CVE-2019-17023


Published: 2020-01-08

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.

Type:

CWE-287

(Improper Authentication)

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Mozilla -> Firefox 
Canonical -> Ubuntu linux 

 References:
https://bugzilla.mozilla.org/show_bug.cgi?id=1590001
https://usn.ubuntu.com/4234-1/
https://www.mozilla.org/security/advisories/mfsa2020-01/

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