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CVE-2019-11743 Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances…
Description
Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 69 | earliest → < 69 | 69 |
| Thunderbird 68.1 | earliest → < 68.1 | 68.1 |
| Thunderbird 60.9 | earliest → < 60.9 | 60.9 |
| Firefox ESR 68.1 | earliest → < 68.1 | 68.1 |
| Firefox ESR 60.9 | earliest → < 60.9 | 60.9 |