CVE-2020-12390
Firefox ESR: Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks.
CVE-2020-12390 is fixed in 4 products on 2 platforms, first by firefox 76.0+build2-0ubuntu0.18.04.1, released May 6, 2020. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
9.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0162
76th percentile
Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.
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 · RHEL 8 | 0:78.2.0-2.el8_2 | RHSA-2020:3557 | Aug 26, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 76.0+build2-0ubuntu0.18.04.1 | firefox 76.0+build2-0ubuntu0.18.04.1 | May 6, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 76.0+build2-0ubuntu0.20.04.1 | firefox 76.0+build2-0ubuntu0.20.04.1 | May 6, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 76.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 76.0+build2-0ubuntu0.18.04.1 | May 6, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 76.0+build2-0ubuntu0.20.04.1 | firefox-geckodriver 76.0+build2-0ubuntu0.20.04.1 | May 6, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 76.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 76.0+build2-0ubuntu0.18.04.1 | May 6, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 76.0+build2-0ubuntu0.20.04.1 | firefox-mozsymbols 76.0+build2-0ubuntu0.20.04.1 | May 6, 2020 |
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