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CVE-2021-38501

Medium priority

Some fixes available 17 of 27

Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38500

Medium priority

Some fixes available 17 of 27

Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38499

Medium priority

Some fixes available 9 of 18

Mozilla developers reported memory safety bugs present in Firefox 92. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code....

5 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
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CVE-2021-38498

Medium priority

Some fixes available 17 of 27

During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.2,...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38497

Medium priority

Some fixes available 17 of 27

Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. This vulnerability affects Firefox < 93,...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38496

Medium priority

Some fixes available 17 of 27

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2,...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38492

Medium priority
Ignored

When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox...

7 affected packages

firefox, firefox-esr, mozjs38, mozjs52, mozjs68...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Not affected Not affected Not in release Not affected
firefox-esr Not in release Not in release Not in release Not in release
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
thunderbird Not affected Not affected Not in release Not affected
mozjs78 Not in release Ignored Not in release Not in release
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CVE-2021-38509

Medium priority

Some fixes available 17 of 27

Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38508

Medium priority

Some fixes available 17 of 27

By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked...

6 affected packages

firefox, mozjs38, mozjs52, mozjs68, mozjs78, thunderbird

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
firefox Fixed Fixed Fixed Fixed
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
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CVE-2021-38507

Medium priority

Some fixes available 17 of 27

The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections...

6 affected packages

mozjs38, mozjs52, mozjs68, mozjs78, thunderbird, firefox

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
mozjs38 Not in release Not in release Not in release Ignored
mozjs52 Not in release Not in release Ignored Ignored
mozjs68 Not in release Not in release Ignored Not in release
mozjs78 Not in release Ignored Not in release Not in release
thunderbird Fixed Fixed Fixed Fixed
firefox Fixed Fixed Fixed Fixed
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