Malicious websites could have confused Firefox into showing the wrong origin when asking to launch a program and handling an external URL protocol. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
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"binary_name": "thunderbird-mozsymbols"
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"binary_name": "xul-ext-calendar-timezones"
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"binary_name": "xul-ext-gdata-provider"
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"binary_name": "xul-ext-lightning"
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"availability": "No subscription required"
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"binary_name": "firefox-mozsymbols"
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"availability": "No subscription required"
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"binary_name": "thunderbird-gnome-support"
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"binary_name": "thunderbird-mozsymbols"
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"binary_name": "xul-ext-calendar-timezones"
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"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
"binary_name": "xul-ext-gdata-provider"
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"binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1",
"binary_name": "xul-ext-lightning"
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"availability": "No subscription required"
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"binary_name": "firefox-mozsymbols"
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"availability": "No subscription required"
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"binary_name": "thunderbird-gnome-support"
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"binary_version": "1:91.5.0+build1-0ubuntu1",
"binary_name": "thunderbird-mozsymbols"
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"binary_version": "1:91.5.0+build1-0ubuntu1",
"binary_name": "xul-ext-calendar-timezones"
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"binary_version": "1:91.5.0+build1-0ubuntu1",
"binary_name": "xul-ext-gdata-provider"
},
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"binary_version": "1:91.5.0+build1-0ubuntu1",
"binary_name": "xul-ext-lightning"
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"availability": "No subscription required"
}