# thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2: thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2 for Ubuntu 18.04.6 LTS (bionic)

thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2, released June 1, 2021, fixes 20 CVEs in thunderbird. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-1-78.11.0-build1-0ubuntu0.18.04.2
- Platform: Linux
- Released: Jun 1, 2021
- Priority: Urgent (Closes CVE-2021-29967, rated Critical)
- CVEs: 20, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-29967](https://patchblox.com/security/data/cve/CVE-2021-29967.md) | Urgent | Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. | 8.8 | 0.0137 |  |
| [CVE-2021-23994](https://patchblox.com/security/data/cve/CVE-2021-23994.md) | High | Firefox ESR and 2 others: A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound… | 8.8 | 0.0176 |  |
| [CVE-2021-23961](https://patchblox.com/security/data/cve/CVE-2021-23961.md) | High | Firefox ESR and 1 other: Further techniques that built on the slipstream research combined with a malicious webpage could have… | 7.4 | 0.0148 |  |
| [CVE-2021-23987](https://patchblox.com/security/data/cve/CVE-2021-23987.md) | High | Firefox ESR and 2 others: Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox… | 8.8 | 0.0142 |  |
| [CVE-2021-23999](https://patchblox.com/security/data/cve/CVE-2021-23999.md) | High | Firefox ESR and 2 others: If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System… | 8.8 | 0.0137 |  |
| [CVE-2021-29946](https://patchblox.com/security/data/cve/CVE-2021-29946.md) | High | Firefox ESR and 2 others: Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed… | 8.8 | 0.0130 |  |
| [CVE-2021-23995](https://patchblox.com/security/data/cve/CVE-2021-23995.md) | High | Firefox ESR and 2 others: When Responsive Design Mode was enabled, it used references to objects that were previously freed. | 8.8 | 0.0118 |  |
| [CVE-2021-23981](https://patchblox.com/security/data/cve/CVE-2021-23981.md) | High | Firefox ESR and 2 others: A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer… | 8.1 | 0.0115 |  |
| [CVE-2021-24002](https://patchblox.com/security/data/cve/CVE-2021-24002.md) | High | Firefox ESR and 2 others: When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would… | 8.8 | 0.0113 |  |
| [CVE-2021-29949](https://patchblox.com/security/data/cve/CVE-2021-29949.md) | High | Thunderbird: When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially… | 7.8 | 0.0032 |  |
| [CVE-2021-29945](https://patchblox.com/security/data/cve/CVE-2021-29945.md) | Routine | Firefox ESR and 2 others: The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and… | 6.5 | 0.0120 |  |
| [CVE-2021-23984](https://patchblox.com/security/data/cve/CVE-2021-23984.md) | Routine | Firefox ESR and 2 others: A malicious extension could have opened a popup window lacking an address bar. | 6.5 | 0.0111 |  |
| [CVE-2021-23991](https://patchblox.com/security/data/cve/CVE-2021-23991.md) | Routine | Thunderbird: If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity… | 6.8 | 0.0104 |  |
| [CVE-2021-29957](https://patchblox.com/security/data/cve/CVE-2021-29957.md) | Routine | Thunderbird and 1 other: If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains… | 4.3 | 0.0094 |  |
| [CVE-2021-29956](https://patchblox.com/security/data/cve/CVE-2021-29956.md) | Routine | Mozilla Thunderbird: OpenPGP secret keys that were imported using Thunderbird version 78.8.1 up to version 78.10.1 were stored… | 4.3 | 0.0081 |  |
| [CVE-2021-23982](https://patchblox.com/security/data/cve/CVE-2021-23982.md) | Routine | Firefox ESR and 2 others: Using techniques that built on the slipstream research, a malicious webpage could have scanned both an… | 6.5 | 0.0074 |  |
| [CVE-2021-23998](https://patchblox.com/security/data/cve/CVE-2021-23998.md) | Routine | Firefox ESR and 2 others: Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon… | 6.5 | 0.0059 |  |
| [CVE-2021-23992](https://patchblox.com/security/data/cve/CVE-2021-23992.md) | Routine | Thunderbird: Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. | 4.3 | 0.0048 |  |
| [CVE-2021-23993](https://patchblox.com/security/data/cve/CVE-2021-23993.md) | Routine | Thunderbird: An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. | 6.5 | 0.0042 |  |
| [CVE-2021-29948](https://patchblox.com/security/data/cve/CVE-2021-29948.md) | Routine | Thunderbird: Signatures are written to disk before and read during verification, which might be subject to a race… | 2.5 | 0.0029 |  |

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Data as of 2026-11-13T01:58:51Z 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

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