Description
The Mozilla Windows updater can be called by a non-privileged user to delete an arbitrary local file by passing a special path to the callback parameter through the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 45.8 and Firefox < 52.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 45.8 | 45.8 |
| Mozilla | Firefox | unspecified – < 52 | 52 |
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.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 45.8.0esr-102.1 | SUSE-SU-2017:0714-1 |
| SLES 12 SP1 | MozillaFirefox | 45.8.0esr-102.1 | SUSE-SU-2017:0714-1 |
| SLES 12 | MozillaFirefox | 45.8.0esr-102.1 | SUSE-SU-2017:0714-1 |
| SLES 11 SP4 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
| SLES 11 SP3 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | MozillaFirefox | 45.8.0esr-102.1 | SUSE-SU-2017:0714-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 45.8.0esr-102.1 | SUSE-SU-2017:0714-1 |
| SLES for SAP 12 | MozillaFirefox | 45.8.0esr-102.1 | SUSE-SU-2017:0714-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
| SUSE Manager 2.1 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 45.8.0esr-68.1 | SUSE-SU-2017:0732-1 |
Advisories 2
- SUSE-SU-2017:0714-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0732-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026