# CVE-2020-6825: Firefox ESR: Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs…

CVE-2020-6825 is fixed in 10 products on 2 platforms, first by firefox 75.0+build3-0ubuntu0.18.04.1, released April 6, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-6825
- Priority: High
- CVSS: 9.8 (Important)
- EPSS: 0.0219
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 6, 2020
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-6825

## Description

Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Mozilla Firefox ESR (en-US) | 78.0esr | [Mozilla Firefox ESR (en-US) 78.0esr](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-78.0esr.md) | Jun 25, 2020 |
| Linux | firefox RHEL 8 | 0:68.7.0-2.el8_1 | [RHSA-2020:1406](https://patchblox.com/security/data/fix/linux/rhsa-2020-1406.md) | Apr 8, 2020 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 75.0+build3-0ubuntu0.18.04.1 | [firefox 75.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-75.0-build3-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 75.0+build3-0ubuntu1 | [firefox 75.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-75.0-build3-0ubuntu1.md) | Apr 6, 2020 |
| Linux | firefox ol 8 | 0:68.7.0-2.0.1.el8_1 | [ELSA-2020-1406](https://patchblox.com/security/data/fix/linux/elsa-2020-1406.md) | Apr 9, 2020 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 75.0+build3-0ubuntu0.18.04.1 | [firefox-geckodriver 75.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-75.0-build3-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 75.0+build3-0ubuntu1 | [firefox-geckodriver 75.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-75.0-build3-0ubuntu1.md) | Apr 6, 2020 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 75.0+build3-0ubuntu0.18.04.1 | [firefox-mozsymbols 75.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-75.0-build3-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 75.0+build3-0ubuntu1 | [firefox-mozsymbols 75.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-75.0-build3-0ubuntu1.md) | Apr 6, 2020 |
| Linux | thunderbird RHEL 8 | 0:68.7.0-1.el8_1 | [RHSA-2020:1495](https://patchblox.com/security/data/fix/linux/rhsa-2020-1495.md) | Apr 16, 2020 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:68.7.0+build1-0ubuntu1 | [thunderbird 1:68.7.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-68.7.0-build1-0ubuntu1.md) | Apr 6, 2020 |
| Linux | thunderbird ol 8 | 0:68.7.0-1.0.1.el8_1 | [ELSA-2020-1495](https://patchblox.com/security/data/fix/linux/elsa-2020-1495.md) | Apr 18, 2020 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:68.7.0+build1-0ubuntu1 | [thunderbird-gnome-support 1:68.7.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-68.7.0-build1-0ubuntu1.md) | Apr 6, 2020 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:68.7.0+build1-0ubuntu1 | [thunderbird-mozsymbols 1:68.7.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-68.7.0-build1-0ubuntu1.md) | Apr 6, 2020 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:68.7.0+build1-0ubuntu1 | [xul-ext-calendar-timezones 1:68.7.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-68.7.0-build1-0ubuntu1.md) | Apr 6, 2020 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:68.7.0+build1-0ubuntu1 | [xul-ext-gdata-provider 1:68.7.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-68.7.0-build1-0ubuntu1.md) | Apr 6, 2020 |
| Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 |
| Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:68.7.0+build1-0ubuntu1 | [xul-ext-lightning 1:68.7.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-68.7.0-build1-0ubuntu1.md) | Apr 6, 2020 |

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