Summary
Multiple security issues were discovered in Firefox. If a user were
tricked into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass security
restrictions, spoof the browser UI, confuse the user, conduct phishing
attacks, or execute arbitrary code. (CVE-2021-38503, CVE-2021-38504,
CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509)
It was discovered that the 'Copy Image Link' context menu action
would copy the final image URL after redirects. If a user were tricked
into copying and pasting a link for an embedded image that triggered
authentication flows back to the page, an attacker could potentially
exploit this to steal authentication tokens.
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | firefox | 94.0+build3-0ubuntu0.18.04.1 |
| Ubuntu · 20.04 LTS 20.04:LTS | firefox | 94.0+build3-0ubuntu0.20.04.1 |
Vulnerabilities 6
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Unscored —
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such…
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Unscored —
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have …
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Unscored —
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user…
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Unscored —
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while …
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Unscored —
By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geol…
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Unscored —
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled…