There is a stack consumption issue in LibSass 3.4.5 that is triggered in the function Sass::Eval::operator() in eval.cpp. It will lead to a remote denial of service attack.
Weakness
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libsass | Libsass | 3.4.5 (including) | 3.4.5 (including) |
| Libsass | Ubuntu | artful | * |
| Libsass | Ubuntu | bionic | * |
| Libsass | Ubuntu | cosmic | * |
| Libsass | Ubuntu | disco | * |
| Libsass | Ubuntu | eoan | * |
| Libsass | Ubuntu | esm-apps/bionic | * |
| Libsass | Ubuntu | esm-apps/focal | * |
| Libsass | Ubuntu | esm-apps/jammy | * |
| Libsass | Ubuntu | esm-apps/noble | * |
| Libsass | Ubuntu | esm-apps/xenial | * |
| Libsass | Ubuntu | focal | * |
| Libsass | Ubuntu | groovy | * |
| Libsass | Ubuntu | hirsute | * |
| Libsass | Ubuntu | impish | * |
| Libsass | Ubuntu | jammy | * |
| Libsass | Ubuntu | kinetic | * |
| Libsass | Ubuntu | lunar | * |
| Libsass | Ubuntu | mantic | * |
| Libsass | Ubuntu | noble | * |
| Libsass | Ubuntu | oracular | * |
| Libsass | Ubuntu | upstream | * |
| Libsass | Ubuntu | xenial | * |
| Libsass | Ubuntu | zesty | * |