CVE-2019-17023

CVE-2019-17023

EPSS 1.3%

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.

Affected products

Mozilla · Firefox

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1590001 https://usn.ubuntu.com/4234-1/https://usn.ubuntu.com/4397-1/https://www.debian.org/security/2020/dsa-4726 https://www.mozilla.org/security/advisories/mfsa2020-01/