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CVE-2020-6805 vulnerabilities and exploits
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8.1
CVSSv3
CVE-2020-6819
Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
Mozilla Thunderbird
Mozilla Firefox
Mozilla Firefox Esr
3 Articles
8.1
CVSSv3
CVE-2020-6820
Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
Mozilla Thunderbird
Mozilla Firefox
Mozilla Firefox Esr
3 Articles
9.8
CVSSv3
CVE-2020-6825
Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited...
Mozilla Firefox
Mozilla Firefox Esr
Mozilla Thunderbird
7.5
CVSSv3
CVE-2020-6821
When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data discl...
Mozilla Firefox
Mozilla Firefox Esr
Mozilla Thunderbird
8.8
CVSSv3
CVE-2020-6822
On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird &l...
Mozilla Firefox
Mozilla Firefox Esr
Mozilla Thunderbird
6.5
CVSSv3
CVE-2020-6808
When a JavaScript URL (javascript:) is evaluated and the result is a string, this string is parsed to create an HTML document, which is then presented. Previously, this document's URL (as reported by the document.location property, for example) was the originating javascript...
Mozilla Firefox
7.5
CVSSv3
CVE-2020-6809
When a Web Extension had the all-urls permission and made a fetch request with a mode set to 'same-origin', it was possible for the Web Extension to read local files. This vulnerability affects Firefox < 74.
Mozilla Firefox
4.3
CVSSv3
CVE-2020-6810
After a website had entered fullscreen mode, it could have used a previously opened popup to obscure the notification that indicates the browser is in fullscreen mode. Combined with spoofing the browser chrome, this could have led to confusing the user about the current origin of...
Mozilla Firefox
5.3
CVSSv3
CVE-2020-6813
When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an malicious user to inject arbitrary styles, bypassing the intent of the Content Security Policy. This vulnerability affects Firefox < 74.
Mozilla Firefox
9.8
CVSSv3
CVE-2020-6815
Mozilla developers reported memory safety and script safety bugs present in Firefox 73. Some of these bugs showed evidence of memory corruption or escalation of privilege and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vu...
Mozilla Firefox
CVSSv3
CVSSv2
CVSSv3
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