CVE-2019-17023

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.

Score

CVSS 3.1 6.5 Medium

Status

Modified - security@mozilla.org

Published

2020-01-08

Last modified

2024-08-05

Weaknesses

CWE-287

Affected products

• Ubuntu Linux (Canonical)
• Debian Linux (Debian)
• Firefox (Mozilla)

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/