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CVE-2021-23987

Status Candidate

Overview

Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. 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. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

Related Files

Ubuntu Security Notice USN-4995-2
Posted Jun 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4995-2 - USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides the corresponding updates for Ubuntu 18.04 LTS. Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the UI, bypass security restrictions, 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 spoof a website and trick the user into providing credentials. Multiple security issues were discovered in Thunderbird's OpenPGP integration. If a user were tricked into importing a specially crafted key in some circumstances, an attacker could potentially exploit this to cause a denial of service or confuse the user. A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. It was discovered that Thunderbird mishandled ftp URLs with encoded newline characters. If a user were tricked into clicking on a specially crafted link, an attacker could potentially exploit this to send arbitrary FTP commands. It was discovered that Thunderbird wrote signatures to disk and read them back during verification. A local attacker could potentially exploit this to replace the data with another signature file. It was discovered that Thunderbird might load an alternative OTR library. If a user were tricked into copying a specially crafted library to one of Thunderbird's search paths, an attacker could potentially exploit this to execute arbitrary code. It was discovered that secret keys imported into Thunderbird were stored unencrypted. A local attacker could potentially exploit this to obtain private keys. It was discovered that Thunderbird did not indicate when an inline signed or encrypted message contained additional unprotected parts. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local, spoof, vulnerability
systems | linux, windows, ubuntu
advisories | CVE-2021-23961, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987, CVE-2021-23994, CVE-2021-23995, CVE-2021-23999, CVE-2021-24002, CVE-2021-29948, CVE-2021-29949, CVE-2021-29956, CVE-2021-29957
SHA-256 | 81edf153f7a8ff7803ae890c659ea5d9e899b6b778102480a52389ef99c260ee
Ubuntu Security Notice USN-4995-1
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4995-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the UI, bypass security restrictions, 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 spoof a website and trick the user into providing credentials. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, windows, ubuntu
advisories | CVE-2021-23961, CVE-2021-23982, CVE-2021-23984, CVE-2021-23987, CVE-2021-23994, CVE-2021-23995, CVE-2021-23999, CVE-2021-24002, CVE-2021-29945, CVE-2021-29948, CVE-2021-29949, CVE-2021-29956, CVE-2021-29957
SHA-256 | 4377b3a315af5e52fb39b7a6d25d2f9f0a167af3746b0bb2a7e6f3615807b933
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
SHA-256 | 5ca81f664f4e17349799dff5ec0303eacf0a8ec7882e1cb1d495ace0532dfaaa
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
SHA-256 | 14468afd1abbcf533ea6611cd505e671361f822b331808ff4f16194ccb84f300
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
SHA-256 | 8a437523e73ce057daeba48d3be4cef9d369c27add95e3b06c0ce5653d6f38a1
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
SHA-256 | 0beb2ace97462de39ed1d992b5064e7d5d9f84b509aa66a9eb5aec5241490152
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
SHA-256 | 230cb77f45733ad34db897a0b588ca5ab5c53732b2700c3f65cb69dd3b978695
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
SHA-256 | 86846d2863092b129999a9295fec81227ed067d13cdd36bd10bf20ccb17aa1bc
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
SHA-256 | 92f592dcd962e5398522f1c3e77119df9ed4cc5f6bdd64edcdd0925207a42fa5
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
SHA-256 | 7cf8093a6f80ac1bc05fe0300de9409c8d3cd88b64b5412d3a49eda9f88728a8
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
SHA-256 | 0a0d78d27867982bbb669a8ab8b155eb15bef29ef1ff4cfce92375ca16cab6fe
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
SHA-256 | 65c3fb96861a5095748a61811fa91692556423c606441e5ff1405d3b8e13070e
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
SHA-256 | 971c6830932725382e9e107349182a7519e5712cda26ef895c57c3cfb73fa216
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