In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Php | Php | 7.4.0 (including) | 7.4.28 (excluding) |
| Php | Php | 8.0.0 (including) | 8.0.16 (excluding) |
| Php | Php | 8.1.0 (including) | 8.1.3 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | php:8.0-8070020220801083134.afd00e68 | * |
| Red Hat Enterprise Linux 8 | RedHat | php:7.4-8070020220707122009.afd00e68 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | php:7.4-8040020250311105031.d7c09045 | * |
| Red Hat Enterprise Linux 8.4 Telecommunications Update Service | RedHat | php:7.4-8040020250311105031.d7c09045 | * |
| Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions | RedHat | php:7.4-8040020250311105031.d7c09045 | * |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | RedHat | php:7.4-8060020250311104929.5caa48ff | * |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Service | RedHat | php:7.4-8060020250311104929.5caa48ff | * |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | RedHat | php:7.4-8060020250311104929.5caa48ff | * |
| Red Hat Enterprise Linux 9 | RedHat | php-0:8.0.20-3.el9 | * |
| Php5 | Ubuntu | trusty | * |
| Php7.0 | Ubuntu | xenial | * |
| Php7.4 | Ubuntu | esm-infra/focal | * |
| Php7.4 | Ubuntu | focal | * |
| Php7.4 | Ubuntu | upstream | * |
| Php8.0 | Ubuntu | impish | * |
| Php8.1 | Ubuntu | devel | * |
| Php8.1 | Ubuntu | jammy | * |
| Php8.1 | Ubuntu | upstream | * |