An exploitable integer overflow exists in the 'BKE_mesh_calc_normals_tessface' functionality of the Blender open-source 3d creation suite. A specially crafted .blend file can cause an integer overflow resulting in a buffer overflow which can allow for code execution under the context of the application. An attacker can convince a user to open a .blend file in order to trigger this vulnerability.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://lists.debian.org/debian-lts-announce/2018/08/msg00011.html | third party advisory mailing list |
| https://www.debian.org/security/2018/dsa-4248 | mailing list third party advisory vendor advisory |
| https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0438 | third party advisory exploit |