Firefox ESR: If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing…
CVE-2020-6798 is fixed in 10 products on 2 platforms, first by firefox 73.0+build3-0ubuntu0.18.04.1, released February 10, 2020. It is not reported as exploited. Patch Radar priority: Routine.
If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.
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 | 0:68.5.0-2.el8_1 | RHSA-2020:0512 | Feb 17, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 73.0+build3-0ubuntu0.18.04.1 | firefox 73.0+build3-0ubuntu0.18.04.1 | Feb 10, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 73.0+build3-0ubuntu1 | firefox 73.0+build3-0ubuntu1 | Feb 10, 2020 |
| firefox · ol 8 | 0:68.5.0-2.0.1.el8_1 | ELSA-2020-0512 | Feb 19, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 73.0+build3-0ubuntu0.18.04.1 | firefox-geckodriver 73.0+build3-0ubuntu0.18.04.1 | Feb 10, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 73.0+build3-0ubuntu1 | firefox-geckodriver 73.0+build3-0ubuntu1 | Feb 10, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 73.0+build3-0ubuntu0.18.04.1 | firefox-mozsymbols 73.0+build3-0ubuntu0.18.04.1 | Feb 10, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 73.0+build3-0ubuntu1 | firefox-mozsymbols 73.0+build3-0ubuntu1 | Feb 10, 2020 |
| thunderbird · RHEL 8 | 0:68.5.0-1.el8_1 | RHSA-2020:0577 | Feb 24, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | thunderbird 1:68.7.0+build1-0ubuntu0.18.04.1 | Apr 6, 2020 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | thunderbird 1:68.5.0+build1-0ubuntu1 | Feb 10, 2020 |
| thunderbird · ol 8 | 0:68.5.0-1.0.1.el8_1 | ELSA-2020-0577 | Feb 26, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:68.7.0+build1-0ubuntu0.18.04.1 | Apr 6, 2020 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | thunderbird-gnome-support 1:68.5.0+build1-0ubuntu1 | Feb 10, 2020 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:68.7.0+build1-0ubuntu0.18.04.1 | Apr 6, 2020 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | thunderbird-mozsymbols 1:68.5.0+build1-0ubuntu1 | Feb 10, 2020 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:68.7.0+build1-0ubuntu0.18.04.1 | Apr 6, 2020 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | xul-ext-calendar-timezones 1:68.5.0+build1-0ubuntu1 | Feb 10, 2020 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:68.7.0+build1-0ubuntu0.18.04.1 | Apr 6, 2020 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | xul-ext-gdata-provider 1:68.5.0+build1-0ubuntu1 | Feb 10, 2020 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:68.7.0+build1-0ubuntu0.18.04.1 | Apr 6, 2020 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | xul-ext-lightning 1:68.5.0+build1-0ubuntu1 | Feb 10, 2020 |
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