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.
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 | esm-apps/bionic | * |
| Libsass | Ubuntu | esm-apps/xenial | * |
| Libsass | Ubuntu | xenial | * |
| Libsass | Ubuntu | zesty | * |