CVE-2019-17023

EPSS 1.3%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 1.3%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

08 Jan 2020Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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/