CVE-2019-17023
Firefox ESR: After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting…
CVE-2019-17023 is fixed in 18 products on 2 platforms, first by firefox 72.0.1+build1-0ubuntu0.18.04.1, released January 8, 2020. It is not reported as exploited. Patch Radar priority: Routine.
RoutineFixed on 2 platforms
CVSS
6.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0134
71st percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 78.0esr | Mozilla Firefox ESR (en-US) 78.0esr | Jun 25, 2020 |
| Linux | |||
| firefox · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox-geckodriver 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox-geckodriver 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox-mozsymbols 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| libnss3 · Ubuntu 18.04.6 LTS (bionic) | 2:3.35-2ubuntu2.8 | libnss3 2:3.35-2ubuntu2.8 | May 25, 2020 |
| libnss3-tools · Ubuntu 18.04.6 LTS (bionic) | 2:3.35-2ubuntu2.8 | libnss3-tools 2:3.35-2ubuntu2.8 | May 25, 2020 |
| nspr · RHEL 8 | 0:4.25.0-2.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nspr · ol 8 | 0:4.25.0-2.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nspr-devel · RHEL 8 | 0:4.25.0-2.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nspr-devel · ol 8 | 0:4.25.0-2.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn-freebl · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-freebl · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-softokn-freebl-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-freebl-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-sysinit · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-sysinit · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-tools · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-tools · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-util · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-util · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |
| nss-util-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-util-devel · ol 8 | 0:3.53.1-11.el8_2 | ELSA-2020-3280 | Aug 4, 2020 |