Firefox ESR and 1 other: When a user typed a URL in the address bar or the search bar and quickly hit the enter key, a website…
CVE-2020-26979 is fixed in 4 products on 2 platforms, first by firefox 84.0+build3-0ubuntu0.18.04.1, released December 14, 2020. It is not reported as exploited. Patch Radar priority: Routine.
When a user typed a URL in the address bar or the search bar and quickly hit the enter key, a website could sometimes capture that event and then redirect the user before navigation occurred to the desired, entered address. To construct a convincing spoof the attacker would have had to guess what the user was typing, perhaps by suggesting it. This vulnerability affects Firefox < 84.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 91.0 | Mozilla Firefox ESR (en-US) 91.0 | Aug 4, 2021 |
| Linux | |||
| firefox · Ubuntu 18.04.6 LTS (bionic) | 84.0+build3-0ubuntu0.18.04.1 | firefox 84.0+build3-0ubuntu0.18.04.1 | Dec 14, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 84.0+build3-0ubuntu0.20.04.1 | firefox 84.0+build3-0ubuntu0.20.04.1 | Dec 14, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 84.0+build3-0ubuntu0.18.04.1 | firefox-geckodriver 84.0+build3-0ubuntu0.18.04.1 | Dec 14, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 84.0+build3-0ubuntu0.20.04.1 | firefox-geckodriver 84.0+build3-0ubuntu0.20.04.1 | Dec 14, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 84.0+build3-0ubuntu0.18.04.1 | firefox-mozsymbols 84.0+build3-0ubuntu0.18.04.1 | Dec 14, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 84.0+build3-0ubuntu0.20.04.1 | firefox-mozsymbols 84.0+build3-0ubuntu0.20.04.1 | Dec 14, 2020 |
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