# CVE-2017-7814: firefox: File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing...

CVE-2017-7814 is fixed in 12 products on 1 platform, first by firefox 56.0+build6-0ubuntu1, released October 1, 2017. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2017-7814
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0119
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 1, 2017

## Description

File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | [firefox 56.0+build6-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-56.0-build6-0ubuntu1.md) | Oct 1, 2017 |
| Linux | firefox-globalmenu Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | [firefox-globalmenu 56.0+build6-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-globalmenu-56.0-build6-0ubuntu1.md) | Oct 1, 2017 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | [firefox-mozsymbols 56.0+build6-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-56.0-build6-0ubuntu1.md) | Oct 1, 2017 |
| Linux | firefox-testsuite Ubuntu 18.04.6 LTS (bionic) | 56.0+build6-0ubuntu1 | [firefox-testsuite 56.0+build6-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-testsuite-56.0-build6-0ubuntu1.md) | Oct 1, 2017 |
| Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [thunderbird 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | thunderbird-globalmenu Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [thunderbird-globalmenu 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-globalmenu-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [thunderbird-gnome-support 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [thunderbird-mozsymbols 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | thunderbird-testsuite Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [thunderbird-testsuite 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-testsuite-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [xul-ext-calendar-timezones 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [xul-ext-gdata-provider 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |
| Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:52.4.0+build1-0ubuntu2 | [xul-ext-lightning 1:52.4.0+build1-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-52.4.0-build1-0ubuntu2.md) | Oct 1, 2017 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo