# CVE-2019-11765: Firefox ESR: A compromised content process could send a message to the parent process that would cause the 'Click…

CVE-2019-11765 is fixed in 4 products on 2 platforms, first by Mozilla Firefox ESR (en-US) 78.0esr, released June 25, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-11765
- Priority: Routine
- CVSS: 6.5 (Medium)
- EPSS: 0.0084
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 22, 2019
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-11765

## Description

A compromised content process could send a message to the parent process that would cause the 'Click to Play' permission prompt to be shown. However, due to lack of validation from the parent process, if the user accepted the permission request an attacker-controlled permission would be granted rather than the 'Click to Play' permission. This vulnerability affects Firefox < 70.

## 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 Ubuntu 18.04.6 LTS (bionic) | 70.0+build2-0ubuntu0.18.04.1 | [firefox 70.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-70.0-build2-0ubuntu0.18.04.1.md) | Jul 9, 2020 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 70.0+build2-0ubuntu1 | [firefox 70.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-70.0-build2-0ubuntu1.md) | Jul 9, 2020 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 70.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 70.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-70.0-build2-0ubuntu0.18.04.1.md) | Jul 9, 2020 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 70.0+build2-0ubuntu1 | [firefox-geckodriver 70.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-70.0-build2-0ubuntu1.md) | Jul 9, 2020 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 70.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 70.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-70.0-build2-0ubuntu0.18.04.1.md) | Jul 9, 2020 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 70.0+build2-0ubuntu1 | [firefox-mozsymbols 70.0+build2-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-70.0-build2-0ubuntu1.md) | Jul 9, 2020 |

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