Firefox ESR and 2 others: A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer…
CVE-2021-23981 is fixed in 11 products on 2 platforms, first by firefox 87.0+build3-0ubuntu0.20.04.2, released March 24, 2021. It is not reported as exploited. Patch Radar priority: High.
A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer used to unpack it, resulting in memory corruption and a potentially exploitable information leak or crash. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
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 |
| Mozilla Thunderbird (en-US) | 78.10.0 | Mozilla Thunderbird (en-US) 78.10.0 | Apr 15, 2021 |
| Linux | |||
| firefox · RHEL 8 | 0:78.9.0-1.el8_3 | RHSA-2021:0990 | Mar 25, 2021 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 87.0+build3-0ubuntu0.18.04.2 | firefox 87.0+build3-0ubuntu0.18.04.2 | Jun 24, 2021 |
| firefox · Ubuntu 20.04 LTS (focal) | 87.0+build3-0ubuntu0.20.04.2 | firefox 87.0+build3-0ubuntu0.20.04.2 | Mar 24, 2021 |
| firefox · ol 8 | 0:78.9.0-1.0.1.el8_3 | ELSA-2021-0990 | Mar 26, 2021 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 87.0+build3-0ubuntu0.18.04.2 | firefox-geckodriver 87.0+build3-0ubuntu0.18.04.2 | Jun 24, 2021 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 87.0+build3-0ubuntu0.20.04.2 | firefox-geckodriver 87.0+build3-0ubuntu0.20.04.2 | Mar 24, 2021 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 87.0+build3-0ubuntu0.18.04.2 | firefox-mozsymbols 87.0+build3-0ubuntu0.18.04.2 | Jun 24, 2021 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 87.0+build3-0ubuntu0.20.04.2 | firefox-mozsymbols 87.0+build3-0ubuntu0.20.04.2 | Mar 24, 2021 |
| thunderbird · RHEL 8 | 0:78.9.0-3.el8_3 | RHSA-2021:0993 | Mar 25, 2021 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| thunderbird · ol 8 | 0:78.9.0-3.0.1.el8_3 | ELSA-2021-0993 | Mar 26, 2021 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-calendar-timezones 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-calendar-timezones 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-gdata-provider 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-gdata-provider 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-lightning 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-lightning 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
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