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CVE-2021-38506

Status Candidate

Overview

Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

Related Files

Debian Security Advisory 5034-1
Posted Jan 28, 2022
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5034-1 - Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code, spoofing, information disclosure, downgrade attacks on SMTP STARTTLS connections or misleading display of OpenPGP/MIME signatures.

tags | advisory, arbitrary, spoof, info disclosure
systems | linux, debian
advisories | CVE-2021-38496, CVE-2021-38500, CVE-2021-38502, CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509, CVE-2021-4126, CVE-2021-43528, CVE-2021-43529, CVE-2021-43534, CVE-2021-43535
SHA-256 | f888fa76ca31bfbcac032ef3035755456561fe803b0f061a25f987500c7081ac
Debian Security Advisory 5026-1
Posted Dec 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5026-1 - Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, information disclosure or spoofing.

tags | advisory, web, arbitrary, spoof, info disclosure
systems | linux, debian
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509, CVE-2021-43534, CVE-2021-43535, CVE-2021-43536, CVE-2021-43537, CVE-2021-43538, CVE-2021-43539, CVE-2021-43541, CVE-2021-43542
SHA-256 | 5dd3e34f7a37e68f3bcb4b4e4a624d36721ad43edbf9d5779c29309bb60ce56e
Red Hat Security Advisory 2021-4605-03
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4605-03 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 91.3.0 ESR. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, web, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | 7174623cd74de4d39aeedcadd0784ebb899d5e656741ac9329db468ebc0aaddd
Red Hat Security Advisory 2021-4607-03
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4607-03 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 91.3.0 ESR. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, web, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | 512060d650183ad9b499ca29fbbaae75872ff7b6386cb9a233685645b36f2964
Red Hat Security Advisory 2021-4134-01
Posted Nov 5, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4134-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.3.0. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | a88eb764b65ec66c46ee3c76b70894989188f4e5965d111b4da0fa51f31687df
Red Hat Security Advisory 2021-4130-01
Posted Nov 5, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4130-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.3.0. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | e8817b7475fcd78d00b1e034f0f524743e2b13cedea16cb733a200b676c97c57
Red Hat Security Advisory 2021-4132-01
Posted Nov 5, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4132-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.3.0. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | 109d37dacc152c7201d9057d84aa66c0523cc939924c87f5d2d8031ddb6be127
Red Hat Security Advisory 2021-4133-01
Posted Nov 5, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4133-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.3.0. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | 55b1c367292bbdb62a4f4100dc6751df2844edde8cb290b99b3d7c708acfbae2
Ubuntu Security Notice USN-5131-1
Posted Nov 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5131-1 - 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2021-38503, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508
SHA-256 | cf33f602acfdfa3ec5e7602c1c32691e14c8afcdb6ee751e6fa06c6b38e76b00
Red Hat Security Advisory 2021-4123-01
Posted Nov 4, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4123-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 91.3.0 ESR. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, web, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | f342798c35f6ececb49efee72ce50fee107ddd1a27d023a5c236b9c003f18c01
Red Hat Security Advisory 2021-4116-01
Posted Nov 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4116-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 91.3.0 ESR. Issues addressed include bypass, spoofing, and use-after-free vulnerabilities.

tags | advisory, web, spoof, vulnerability
systems | linux, redhat
advisories | CVE-2021-38503, CVE-2021-38504, CVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509
SHA-256 | d340da3bbc0d873d4f3d090e0b35d5f195584390daf77c757942fa75f7f37205
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