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CVE-2021-23960

Status Candidate

Overview

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Related Files

Ubuntu Security Notice USN-4736-1
Posted Feb 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4736-1 - 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, or execute arbitrary code. It was discovered that responses received during the plaintext phase of the STARTTLS connection setup were subsequently evaluated during the encrypted session. A person in the middle could potentially exploit this to perform a response injection attack. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-15685, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960
MD5 | f6196100b7e6c3859b8474631f16bf7e
Red Hat Security Advisory 2021-0397-01
Posted Feb 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0397-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.7.0. Issues addressed include an information leakage vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-15685, CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | 99a439d8c05f33dc51800978dab21d53
Gentoo Linux Security Advisory 202102-02
Posted Feb 1, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202102-2 - Multiple vulnerabilities have been found in Mozilla Thunderbird, the worst of which could result in the arbitrary execution of code. Versions less than 78.7.0 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2020-15685, CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | ebc98d5b25ce0c41703e4d2f27db7413
Gentoo Linux Security Advisory 202102-01
Posted Feb 1, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202102-1 - Multiple vulnerabilities have been found in Mozilla Firefox, the worst of which could result in the arbitrary execution of code. Versions less than 85.0 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2021-23953, CVE-2021-23954, CVE-2021-23955, CVE-2021-23956, CVE-2021-23958, CVE-2021-23960, CVE-2021-23961, CVE-2021-23962, CVE-2021-23963, CVE-2021-23964, CVE-2021-23965, CVE-2021-26976
MD5 | 517955742b3ce4ae0d2c862d8d2b85b0
Red Hat Security Advisory 2021-0299-01
Posted Jan 29, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0299-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.7.0. Issues addressed include an information leakage vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-15685, CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | 286384cab756e2967e146adf2bf096db
Red Hat Security Advisory 2021-0298-01
Posted Jan 29, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0298-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.7.0. Issues addressed include an information leakage vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-15685, CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | fa853bb8cb813ea7fdd700c5a9aba5cb
Red Hat Security Advisory 2021-0297-01
Posted Jan 29, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0297-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.7.0. Issues addressed include an information leakage vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2020-15685, CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | 868682441c0b4bca4a31832080f0f1b9
Red Hat Security Advisory 2021-0290-01
Posted Jan 28, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0290-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.7.0 ESR. Issues addressed include an information leakage vulnerability.

tags | advisory, web
systems | linux, redhat
advisories | CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | 23de7908f0a14058e0e2953b7c17c73b
Red Hat Security Advisory 2021-0289-01
Posted Jan 28, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0289-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.7.0 ESR. Issues addressed include an information leakage vulnerability.

tags | advisory, web
systems | linux, redhat
advisories | CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | 680f285e060eaac272c2dd60cadaec74
Red Hat Security Advisory 2021-0288-01
Posted Jan 28, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0288-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.7.0 ESR. Issues addressed include an information leakage vulnerability.

tags | advisory, web
systems | linux, redhat
advisories | CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | 2ab343e1850374f3ce10ab0fe7db2ceb
Red Hat Security Advisory 2021-0285-01
Posted Jan 28, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0285-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.7.0 ESR. Issues addressed include an information leakage vulnerability.

tags | advisory, web
systems | linux, redhat
advisories | CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964
MD5 | abcf489fc3c560d33113f4730af1bb40
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