Description
It is possible to spoof the sender's email address and display an arbitrary sender address to the email recipient. The real sender's address is not displayed if preceded by a null character in the display string. This vulnerability affects Thunderbird < 52.5.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 52.5.2 | 52.5.2 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | thunderbird | 1:52.5.2-1 | — |
| Debian 13 | thunderbird | 1:52.5.2-1 | — |
| Debian 12 | thunderbird | 1:52.5.2-1 | — |
| Debian 9 | thunderbird | 1:52.5.2-2~deb9u1 | DSA-4075-1 |
| Debian 8 | thunderbird | 1:52.5.2-2~deb8u1 | DSA-4075-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | thunderbird | 1:52.5.2-1~deb7u1 | DLA-1223-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | thunderbird | 1:52.6.0+build1-0ubuntu0.16.04.1 | USN-3529-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:52.6.0+build1-0ubuntu0.14.04.1 | USN-3529-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | thunderbird | 52.5.2-1.el7_4 | RHSA-2018:0061 |
| RHEL 6 | thunderbird | 52.5.2-1.el6_9 | RHSA-2018:0061 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | MozillaThunderbird | 52.5.2-51.1 | openSUSE-SU-2017:3434-1, openSUSE-SU-2017:3433-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | thunderbird | 52.5.2-1.0.1.el7_4 | ELSA-2018-0061 |
Advisories 8
- RHSA-2018:0061 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3529-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4075-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1223-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2017:3434-1 Security update for Mozilla Thunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:3433-1 Security update for Mozilla Thunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2018-0061 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 8, 2018
References
- [debian-lts-announce] 20171227 [SECURITY] [DLA 1223-1] thunderbird security update mailing-list
- USN-3529-1 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1423432
- 102258 vdb-entry
- 1040123 vdb-entry
- https://www.mozilla.org/security/advisories/mfsa2017-30/
- DSA-4075 vendor-advisory
- RHSA-2018:0061 vendor-advisory