Description
A newline in a filename could have been used to bypass the file extension security mechanisms that replace malicious file extensions such as .lnk with .download. This could have led to accidental execution of malicious code.
*This bug only affects Firefox and Thunderbird on Windows. Other versions of Firefox and Thunderbird are unaffected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 112 | 112 |
| Mozilla | Firefox ESR | unspecified – < 102.10 | 102.10 |
| Mozilla | Thunderbird | unspecified – < 102.10 | 102.10 |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mozjs78 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES 15 SP4 | MozillaThunderbird | 102.10.1-150200.8.113.2 | SUSE-SU-2023:2064-1 |
| SLES 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES 15 SP2 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES 15 SP1 | MozillaFirefox | 102.10.0-150000.150.82.1 | SUSE-SU-2023:1817-1 |
| SLES 12 SP5 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLES 12 SP2 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 102.10.0-150000.150.82.1 | SUSE-SU-2023:1817-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLE Real Time 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 102.10.0-150000.150.82.1 | SUSE-SU-2023:1817-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 112.0.1-1.1 | openSUSE-SU-2024:12882-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.10.0-1.1 | openSUSE-SU-2024:12852-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 102.10.1-150200.8.113.2 | SUSE-SU-2023:2064-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.10.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 102.10.0-r0 | — |
Advisories 9
- WID-SEC-2023-2031 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- openSUSE-SU-2024:12852-1 MozillaThunderbird-102.10.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12882-1 MozillaFirefox-112.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2064-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1817-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1855-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1819-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-0941 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023