# CVE-2019-11740: Firefox ESR: Mozilla developers and community members reported memory safety bugs present in Firefox 68, Firefox ESR…

CVE-2019-11740 is fixed in 11 products on 2 platforms, first by firefox 69.0+build2-0ubuntu0.18.04.1, released September 3, 2019. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2019-11740
- Priority: High
- CVSS: 9.8 (Important)
- EPSS: 0.0164
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 3, 2019
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-11740

## Description

Mozilla developers and community members reported memory safety bugs present in Firefox 68, Firefox ESR 68, and Firefox 60.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

## 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 | 0:68.1.0-1.el8_0 | [RHSA-2019:2663](https://patchblox.com/security/data/fix/linux/rhsa-2019-2663.md) | Sep 4, 2019 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | [firefox 69.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-69.0-build2-0ubuntu0.18.04.1.md) | Sep 3, 2019 |
| Linux | firefox ol 8 | 0:68.1.0-1.0.1.el8_0 | [ELSA-2019-2663](https://patchblox.com/security/data/fix/linux/elsa-2019-2663.md) | Sep 6, 2019 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 69.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-69.0-build2-0ubuntu0.18.04.1.md) | Sep 3, 2019 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 69.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 69.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-69.0-build2-0ubuntu0.18.04.1.md) | Sep 3, 2019 |
| Linux | thunderbird RHEL 8 | 0:60.9.0-2.el8_0 | [RHSA-2019:2774](https://patchblox.com/security/data/fix/linux/rhsa-2019-2774.md) | Sep 16, 2019 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | thunderbird ol 8 | 0:60.9.0-2.0.1.el8_0 | [ELSA-2019-2774](https://patchblox.com/security/data/fix/linux/elsa-2019-2774.md) | Sep 17, 2019 |
| Linux | thunderbird-globalmenu Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird-globalmenu 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-globalmenu-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:60.9.0+build1-0ubuntu0.18.04.1 | [xul-ext-lightning 1:60.9.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-60.9.0-build1-0ubuntu0.18.04.1.md) | Sep 27, 2019 |

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