firefox: A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements
CVE-2018-18500 is fixed in 12 products on 1 platform, first by firefox 65.0+build2-0ubuntu0.18.04.1, released January 29, 2019. It is not reported as exploited. Patch Radar priority: Routine.
A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| firefox · Ubuntu 18.04.6 LTS (bionic) | 65.0+build2-0ubuntu0.18.04.1 | firefox 65.0+build2-0ubuntu0.18.04.1 | Jan 29, 2019 |
| firefox-globalmenu · Ubuntu 18.04.6 LTS (bionic) | 65.0+build2-0ubuntu0.18.04.1 | firefox-globalmenu 65.0+build2-0ubuntu0.18.04.1 | Jan 29, 2019 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 65.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 65.0+build2-0ubuntu0.18.04.1 | Jan 29, 2019 |
| firefox-testsuite · Ubuntu 18.04.6 LTS (bionic) | 65.0+build2-0ubuntu0.18.04.1 | firefox-testsuite 65.0+build2-0ubuntu0.18.04.1 | Jan 29, 2019 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | thunderbird 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| thunderbird-globalmenu · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | thunderbird-globalmenu 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| thunderbird-testsuite · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | thunderbird-testsuite 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:60.5.1+build2-0ubuntu0.18.04.1 | xul-ext-lightning 1:60.5.1+build2-0ubuntu0.18.04.1 | Feb 13, 2019 |
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