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CVE-2021-23984

Status Candidate

Overview

A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Thunderbird < 78.9, and Firefox < 87.

Related Files

Gentoo Linux Security Advisory 202104-10
Posted May 3, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202104-10 - Multiple vulnerabilities have been found in Mozilla Firefox, the worst of which could result in the arbitrary execution of code. Versions less than 88.0 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2021-23961, CVE-2021-23968, CVE-2021-23969, CVE-2021-23970, CVE-2021-23971, CVE-2021-23972, CVE-2021-23973, CVE-2021-23974, CVE-2021-23975, CVE-2021-23976, CVE-2021-23977, CVE-2021-23978, CVE-2021-23981, CVE-2021-23982, CVE-2021-23983, CVE-2021-23984, CVE-2021-23985, CVE-2021-23986, CVE-2021-23987, CVE-2021-23988, CVE-2021-23994, CVE-2021-23995, CVE-2021-23998, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945
MD5 | 4a4d41e18018c457ccf1476fd1a1da84
Gentoo Linux Security Advisory 202104-09
Posted May 3, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202104-9 - Multiple vulnerabilities have been found in Mozilla Thunderbird, the worst of which could result in the arbitrary execution of code. Versions less than 78.10.0 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2021-23961, CVE-2021-23968, CVE-2021-23969, CVE-2021-23973, CVE-2021-23978, CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987, CVE-2021-23994, CVE-2021-23995, CVE-2021-23998, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945, CVE-2021-29946, CVE-2021-29948
MD5 | e91e12fed2987d793090726d1bf8df74
Ubuntu Security Notice USN-4893-1
Posted Mar 26, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4893-1 - 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, obtain sensitive information, or execute arbitrary code. It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spook a website and trick the user into providing credentials. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, windows, ubuntu
advisories | CVE-2021-23981, CVE-2021-23983, CVE-2021-23984, CVE-2021-23985, CVE-2021-23986, CVE-2021-23987
MD5 | 361f6d2ac9ae9e3ba90818da079bb556
Red Hat Security Advisory 2021-0992-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0992-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.9.0 ESR. Issues addressed include a spoofing vulnerability.

tags | advisory, web, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | 733b0f1a6487f3ea89ed22f34470c0f7
Red Hat Security Advisory 2021-0996-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0996-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.0. Issues addressed include a spoofing vulnerability.

tags | advisory, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | 485bd0846f543d3cc7f9a52abaf90a21
Red Hat Security Advisory 2021-0991-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0991-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.9.0 ESR. Issues addressed include a spoofing vulnerability.

tags | advisory, web, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | 1731b7821447c2facdea627ff316d371
Red Hat Security Advisory 2021-0994-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0994-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.0. Issues addressed include a spoofing vulnerability.

tags | advisory, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | 67797af2fb70a936c33eea7b4b553d95
Red Hat Security Advisory 2021-0989-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0989-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.9.0 ESR. Issues addressed include a spoofing vulnerability.

tags | advisory, web, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | f746f33fe09674ebd846f4997a9116b9
Red Hat Security Advisory 2021-0993-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0993-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.0. Issues addressed include a spoofing vulnerability.

tags | advisory, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | 4bf3d710a4f1ceafce1c197be71f9dca
Red Hat Security Advisory 2021-0995-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0995-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.9.0. Issues addressed include a spoofing vulnerability.

tags | advisory, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | 10a9a7a671e4c1aec2fd1223d491c4e1
Red Hat Security Advisory 2021-0990-01
Posted Mar 25, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0990-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.9.0 ESR. Issues addressed include a spoofing vulnerability.

tags | advisory, web, spoof
systems | linux, redhat
advisories | CVE-2021-23981, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987
MD5 | bb311d79b5aeefbfec98a69bd3281455
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