Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 improperly follow the CORS cross-origin request algorithm for the POST method in situations involving an unspecified Content-Type header manipulation, which allows remote attackers to bypass the Same Origin Policy by leveraging the lack of a preflight-request step.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | 38.0 (including) | 38.0 (including) |
| Firefox | Mozilla | 38.0.1 (including) | 38.0.1 (including) |
| Firefox | Mozilla | 38.0.5 (including) | 38.0.5 (including) |
| Firefox | Mozilla | 38.1.0 (including) | 38.1.0 (including) |
| Firefox | Mozilla | 38.1.1 (including) | 38.1.1 (including) |
| Firefox | Mozilla | 38.2.0 (including) | 38.2.0 (including) |
| Firefox | Mozilla | 38.2.1 (including) | 38.2.1 (including) |
| Firefox | Mozilla | 38.3.0 (including) | 38.3.0 (including) |
| Red Hat Enterprise Linux 5 | RedHat | firefox-0:38.4.0-1.el5_11 | * |
| Red Hat Enterprise Linux 5 | RedHat | thunderbird-0:38.4.0-1.el5_11 | * |
| Red Hat Enterprise Linux 6 | RedHat | firefox-0:38.4.0-1.el6_7 | * |
| Red Hat Enterprise Linux 6 | RedHat | thunderbird-0:38.4.0-1.el6_7 | * |
| Red Hat Enterprise Linux 7 | RedHat | firefox-0:38.4.0-1.el7_1 | * |
| Red Hat Enterprise Linux 7 | RedHat | thunderbird-0:38.4.0-1.el7_2 | * |
| Firefox | Ubuntu | devel | * |
| Firefox | Ubuntu | precise | * |
| Firefox | Ubuntu | trusty | * |
| Firefox | Ubuntu | upstream | * |
| Firefox | Ubuntu | vivid | * |
| Firefox | Ubuntu | wily | * |
| Thunderbird | Ubuntu | devel | * |
| Thunderbird | Ubuntu | precise | * |
| Thunderbird | Ubuntu | trusty | * |
| Thunderbird | Ubuntu | upstream | * |
| Thunderbird | Ubuntu | vivid | * |
| Thunderbird | Ubuntu | wily | * |