| Titel | micropython micropython v1.21.0 to v1.22.0-preview use after free |
|---|
| Beschreibung | The problem is from allocating fd for a poll object (poll_obj_t), at poll_set_add_fd because it frees previously allocated fds at m_renew.
It reallocates the whole array poll_set->pollfds by m_renew. it causes all accesses to objects after m_renew as use-after-free, and we observed some fd is overlapped with a poll object; it will lead to unintended behavior and chunk-overlapping, which can be used as a vulnerability by attackers in a way they try to malformed an object or fd by using each other.
|
|---|
| Quelle | ⚠️ https://github.com/micropython/micropython/issues/12887 |
|---|
| Benutzer | qbit (UID 60633) |
|---|
| Einreichung | 28.12.2023 08:44 (vor 2 Jahren) |
|---|
| Moderieren | 28.12.2023 11:30 (3 hours later) |
|---|
| Status | Akzeptiert |
|---|
| VulDB Eintrag | 249158 [MicroPython 1.21.0/1.22.0-preview extmod/modselect.c poll_set_add_fd Pufferüberlauf] |
|---|
| Punkte | 20 |
|---|