HuffmanTree_makeFromFrequencies in lodepng.c in LodePNG through 2019-09-28, as used in WinPR in FreeRDP and other products, has a memory leak because a supplied realloc pointer (i.e., the first argument to realloc) is also used for a realloc return value.
Weakness
The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Freerdp | Freerdp | * | 1.0.2 (including) |
| Freerdp | Freerdp | 1.1.0-beta1 (including) | 1.1.0-beta1 (including) |
| Freerdp | Ubuntu | bionic | * |
| Freerdp | Ubuntu | trusty | * |
| Freerdp | Ubuntu | xenial | * |
| Freerdp2 | Ubuntu | trusty | * |
| Freerdp2 | Ubuntu | upstream | * |
Potential Mitigations
References
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00005.html
- https://github.com/FreeRDP/FreeRDP/commit/9fee4ae076b1ec97b97efb79ece08d1dab4df29a
- https://github.com/FreeRDP/FreeRDP/issues/5645
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00005.html
- https://github.com/FreeRDP/FreeRDP/commit/9fee4ae076b1ec97b97efb79ece08d1dab4df29a
- https://github.com/FreeRDP/FreeRDP/issues/5645