Firefox ESR and 1 other: When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose…
CVE-2020-15682 is fixed in 4 products on 2 platforms, first by firefox 82.0+build2-0ubuntu0.18.04.1, released October 21, 2020. It is not reported as exploited. Patch Radar priority: Routine.
When a link to an external protocol was clicked, a prompt was presented that allowed the user to choose what application to open it in. An attacker could induce that prompt to be associated with an origin they didn't control, resulting in a spoofing attack. This was fixed by changing external protocol prompts to be tab-modal while also ensuring they could not be incorrectly associated with a different origin. This vulnerability affects Firefox < 82.
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) | 82.0+build2-0ubuntu0.18.04.1 | firefox 82.0+build2-0ubuntu0.18.04.1 | Oct 21, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 82.0+build2-0ubuntu0.20.04.1 | firefox 82.0+build2-0ubuntu0.20.04.1 | Oct 21, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 82.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 82.0+build2-0ubuntu0.18.04.1 | Oct 21, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 82.0+build2-0ubuntu0.20.04.1 | firefox-geckodriver 82.0+build2-0ubuntu0.20.04.1 | Oct 21, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 82.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 82.0+build2-0ubuntu0.18.04.1 | Oct 21, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 82.0+build2-0ubuntu0.20.04.1 | firefox-mozsymbols 82.0+build2-0ubuntu0.20.04.1 | Oct 21, 2020 |
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