A vulnerability was found in Blender 3d Creation Suite 2.78c (Image Processing Software). It has been declared as critical. This vulnerability affects an unknown code of the component Particle Object Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. 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 can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An exploitable integer overflow exists in the way that the Blender open-source 3d creation suite v2.78c draws a Particle object. 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 the file or use the file as a library in order to trigger this vulnerability.

The bug was discovered 01/11/2018. The weakness was released 04/24/2018 (Website). The advisory is shared for download at debian.org. This vulnerability was named CVE-2017-12104 since 07/31/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 103 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 111140 (Debian DSA-4248-1 : blender - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (111140).

Productinfo

Type

• Image Processing Software

Vendor

• Blender

Name

• 3d Creation Suite

Version

• 2.78c

License

• open-source

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