If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.
The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 100.0.2 (excluding) |
| Firefox_esr | Mozilla | * | 91.9.1 (excluding) |
| Thunderbird | Mozilla | * | 91.9.1 (excluding) |
| Red Hat Enterprise Linux 7 | RedHat | firefox-0:91.9.1-1.el7_9 | * |
| Red Hat Enterprise Linux 7 | RedHat | thunderbird-0:91.9.1-1.el7_9 | * |
| Red Hat Enterprise Linux 8 | RedHat | thunderbird-0:91.9.1-1.el8_6 | * |
| Red Hat Enterprise Linux 8 | RedHat | firefox-0:91.9.1-1.el8_6 | * |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | RedHat | firefox-0:91.9.1-1.el8_1 | * |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | RedHat | thunderbird-0:91.9.1-1.el8_1 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | firefox-0:91.9.1-1.el8_2 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | thunderbird-0:91.9.1-1.el8_2 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | firefox-0:91.9.1-1.el8_4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | thunderbird-0:91.9.1-1.el8_4 | * |
| Red Hat Enterprise Linux 9 | RedHat | firefox-0:91.9.1-1.el9_0 | * |
| Red Hat Enterprise Linux 9 | RedHat | thunderbird-0:91.9.1-1.el9_0 | * |
| Firefox | Ubuntu | bionic | * |
| Firefox | Ubuntu | focal | * |
| Firefox | Ubuntu | impish | * |
| Firefox | Ubuntu | trusty | * |
| Firefox | Ubuntu | upstream | * |
| Firefox | Ubuntu | xenial | * |
| Thunderbird | Ubuntu | bionic | * |
| Thunderbird | Ubuntu | focal | * |
| Thunderbird | Ubuntu | impish | * |
| Thunderbird | Ubuntu | jammy | * |
| Thunderbird | Ubuntu | kinetic | * |
| Thunderbird | Ubuntu | trusty | * |
| Thunderbird | Ubuntu | upstream | * |
| Thunderbird | Ubuntu | xenial | * |