The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a crafted RAR archive. NOTE: this may be the same as one of the several test cases in the CVE-2017-11189 references.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Unrar | Rarlab | 0.0.1 (including) | 0.0.1 (including) |
| Unrar-free | Ubuntu | artful | * |
| Unrar-free | Ubuntu | esm-apps/xenial | * |
| Unrar-free | Ubuntu | esm-infra-legacy/trusty | * |
| Unrar-free | Ubuntu | trusty | * |
| Unrar-free | Ubuntu | trusty/esm | * |
| Unrar-free | Ubuntu | upstream | * |
| Unrar-free | Ubuntu | xenial | * |
| Unrar-free | Ubuntu | zesty | * |
Potential Mitigations
References
- http://www.openwall.com/lists/oss-security/2017/08/20/1
- https://bugs.debian.org/874061
- https://lists.debian.org/debian-lts-announce/2021/02/msg00026.html
- http://www.openwall.com/lists/oss-security/2017/08/20/1
- https://bugs.debian.org/874061
- https://lists.debian.org/debian-lts-announce/2021/02/msg00026.html