CVE-2017-7843
High
Description
When Private Browsing mode is used, it is possible for a web worker to write persistent data to IndexedDB and fingerprint a user uniquely. IndexedDB should not be available in Private Browsing mode and this stored data will persist across multiple private browsing mode sessions because it is not cleared when exiting. This vulnerability affects Firefox ESR < 52.5.2 and Firefox < 57.0.1.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Firefox
PublishedJun 11, 2018
First seenJun 11, 2018
How to fix
Update
- mozilla firefox57.0.1, 52.5.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 57.0.1, v < 52.5.2 | 57.0.1, 52.5.2 |
| debian debian_linux | 7.0, 8.0, 9.0 | — |
| redhat enterprise_linux_desktop | 6.0, 7.0 | — |
| redhat enterprise_linux_server | 6.0, 7.0 | — |
| redhat enterprise_linux_server_aus | 7.4 | — |
| redhat enterprise_linux_server_eus | 7.4, 7.5 | — |
| redhat enterprise_linux_workstation | 6.0, 7.0 | — |
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