# firefox 77.0.1+build1-0ubuntu0.18.04.1: firefox 77.0.1+build1-0ubuntu0.18.04.1 for Ubuntu 18.04.6 LTS (bionic)

firefox 77.0.1+build1-0ubuntu0.18.04.1, released June 2, 2020, fixes 8 CVEs in firefox. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-77.0.1-build1-0ubuntu0.18.04.1
- Platform: Linux
- Released: Jun 2, 2020
- Priority: High (Closes CVE-2020-12410, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | Ubuntu 18.04.6 LTS (bionic) | 77.0.1+build1-0ubuntu0.18.04.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-12410](https://patchblox.com/security/data/cve/CVE-2020-12410.md) | High | Firefox ESR: Mozilla developers reported memory safety bugs present in Firefox 76 and Firefox ESR 68.8. | 8.8 | 0.0173 |  |
| [CVE-2020-12409](https://patchblox.com/security/data/cve/CVE-2020-12409.md) | High | Firefox ESR: When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an… | 8.8 | 0.0118 |  |
| [CVE-2020-12411](https://patchblox.com/security/data/cve/CVE-2020-12411.md) | High | Firefox ESR: Mozilla developers reported memory safety bugs present in Firefox 76. | 8.8 | 0.0117 |  |
| [CVE-2020-12406](https://patchblox.com/security/data/cve/CVE-2020-12406.md) | High | Firefox ESR: Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting… | 8.8 | 0.0102 |  |
| [CVE-2020-12405](https://patchblox.com/security/data/cve/CVE-2020-12405.md) | Routine | Firefox ESR: When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a… | 5.3 | 0.0135 |  |
| [CVE-2020-12407](https://patchblox.com/security/data/cve/CVE-2020-12407.md) | Routine | Firefox ESR: Mozilla Developer Nicolas Silva found that when using WebRender, Firefox would under certain conditions… | 6.5 | 0.0097 |  |
| [CVE-2020-12408](https://patchblox.com/security/data/cve/CVE-2020-12408.md) | Routine | Firefox ESR: When browsing a document hosted on an IP address, an attacker could insert certain characters to flip… | 6.5 | 0.0096 |  |
| [CVE-2020-12399](https://patchblox.com/security/data/cve/CVE-2020-12399.md) | Routine | Firefox ESR: NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually… | 4.4 | 0.0065 |  |

---

Data as of 2026-11-12T13:55:20Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.