There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
| 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 | esm-apps/bionic | * |
| Libsass | Ubuntu | esm-apps/xenial | * |
| Libsass | Ubuntu | xenial | * |
| Libsass | Ubuntu | zesty | * |