| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 52.0 | 52.0 |
| thunderbird | < 52.0 | 52.0 |
If a malicious site repeatedly triggers a modal authentication prompt, eventually the browser UI will become non-responsive, requiring shutdown through the operating system. This is a denial of service (DOS) attack. This vulnerability affects Firefox < 52 and Thunderbird < 52.
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