An improper array index validation vulnerability exists in the stlfixnormaldirections functionality of ADMesh Master Commit 767a105 and v0.98.4. A specially-crafted stl file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

ADMesh through 0.98.4 has a heap-based buffer over-read in stlupdateconnectsremove1 (called from stlremovedegenerate) in connect.c in libadmesh.a.

A security flaw has been discovered in admesh up to 0.98.5. This issue affects the function stlchecknormalvector of the file src/normals.c. Performing a manipulation results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. It looks like this product is not really maintained anymore.