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CVE-2020-26974

Status Candidate

Overview

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

Related Files

Ubuntu Security Notice USN-4701-1
Posted Jan 20, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4701-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass the CSS sanitizer, or execute arbitrary code. It was discovered that the proxy.onRequest API did not catch view-source URLs. If a user were tricked in to installing an extension with the proxy permission and opening View Source, an attacker could potentially exploit this to obtain sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2020-16042, CVE-2020-26970, CVE-2020-26973, CVE-2020-26974, CVE-2020-35111, CVE-2020-35113
SHA-256 | 1074e9c60b4f3aa25817c65900473466ad1d61de91ee2b39415cd68b2b3d141a
Debian Security Advisory 4813-1
Posted Dec 28, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4813-1 - 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 CSS sanitiser bypass.

tags | advisory, web, arbitrary, info disclosure
systems | linux, debian
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 7c049e9f2c3d5a2f9bfcba92b367e1a93fb8ae2453346e9edbe11ef5a1674714
Debian Security Advisory 4815-1
Posted Dec 28, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4815-1 - Multiple security issues have been found in Thunderbird, which may lead to the execution of arbitrary code, denial of service or information leak.

tags | advisory, denial of service, arbitrary
systems | linux, debian
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 2f3172812c238f2f1fb029f212200ab8a63472748c4d507b24ac570b668ebaf9
Gentoo Linux Security Advisory 202012-20
Posted Dec 24, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202012-20 - Multiple vulnerabilities have been found in Mozilla Firefox and Mozilla Thunderbird, the worst of which could result in the arbitrary execution of code. Versions less than 84.0 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | de30a1e21e5b7ada6ec4bcbb46cceddbefafa75528b46c501c1e55964f1b231f
Red Hat Security Advisory 2020-5645-01
Posted Dec 21, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5645-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.6.0. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26970, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | c3b8d96edc20367b29b6f1567947889144e9e30c79eeaebacc093d90b4c06f30
Red Hat Security Advisory 2020-5644-01
Posted Dec 21, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5644-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.6.0. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26970, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 9d6b9ce88303489777415c0698630da4a4b24f0c0dea446783c5dfab50281584
Red Hat Security Advisory 2020-5624-01
Posted Dec 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5624-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.6.0. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | d73da8cf8633196724190d037d4a637357e4de5ee22c53686602843ab37dc815
Red Hat Security Advisory 2020-5622-01
Posted Dec 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5622-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.6.0. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 3299b101c23ed4bdd8c74390c6aba9ffe059b2263c73916da04da21a12f82872
Red Hat Security Advisory 2020-5618-01
Posted Dec 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5618-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 78.6.0. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | cb7596a1511b1dcddcb41ae11f83810a42ffe8d9d5cb65daab66fd2776e78a04
Red Hat Security Advisory 2020-5561-01
Posted Dec 16, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5561-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.6.0 ESR. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | ca3466b7761859d3d6987ea698fdc515f4af1e8fc6d492fbb7e5591cf48ba090
Red Hat Security Advisory 2020-5565-01
Posted Dec 16, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5565-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.6.0 ESR. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 1d9b01a8fe13f99a1ec3b0a95d02901d72757e0880ee055cd8711214397e7e5f
Red Hat Security Advisory 2020-5563-01
Posted Dec 16, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5563-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.6.0 ESR. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 906d76c49b4a7842966f669e453460ed81d8b75ec9e8954f68ff6b496e5f1901
Red Hat Security Advisory 2020-5562-01
Posted Dec 16, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5562-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.6.0 ESR. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | 998d2429ad1fb62147deada155fb6a5fb1f43b5b7613d0101f00821f26fe0563
Red Hat Security Advisory 2020-5564-01
Posted Dec 16, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5564-01 - Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.6.0 ESR. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113
SHA-256 | e6484a6cffc48704dc129b53b332cfe62c59dbd1010cc46447bd096e73986049
Ubuntu Security Notice USN-4671-1
Posted Dec 16, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4671-1 - 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, bypass the CSS sanitizer, bypass security restrictions, spoof the URL bar, or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, spoof
systems | linux, ubuntu
advisories | CVE-2020-16042, CVE-2020-26971, CVE-2020-26972, CVE-2020-26974, CVE-2020-26976, CVE-2020-26978, CVE-2020-35111, CVE-2020-35113, CVE-2020-35114
SHA-256 | 318576415b678ce672ff1ee419536f7289fbdf5ff9c3f7eb5065d84831db1039
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