An attacker-controlled pointer free in Busyboxs hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.
The product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc().
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Busybox | Busybox | 1.33.0 (including) | 1.33.0 (including) |
| Busybox | Busybox | 1.33.1 (including) | 1.33.1 (including) |
| Busybox | Ubuntu | trusty | * |
| Busybox | Ubuntu | upstream | * |
| Busybox | Ubuntu | xenial | * |