Zero-Day Advisory

Fortinet Discovers Adobe Flash Player MP4 Image Resolution Handling Heap Overflow Vulnerability II

Summary

Fortinet's FortiGuard Labs has discovered a heap overflow vulnerability in Adobe Flash Player.
Adobe Flash Player is free software for using content created on the Adobe Flash platform, including viewing multimedia, executing rich Internet applications, and streaming video and audio. Flash Player can run from a web browser as a browser plug-in or on supported mobile devices. Flash Player has a wide user base, and is a common format for games, animations, and graphical user interfaces (GUIs) embedded in web pages. Adobe states that more than 400 million out of over 1 billion connected desktops update to the new version of Flash Player within six weeks of release.
An instance of a heap overflow vulnerability has been discovered in Flash Player h264 decoder routine. The vulnerability can be triggered by a specifically crafted MP4 file with image resolution smaller than specified, which causes an out of bounds memory access. Attackers can exploit the vulnerability for unintended reads, writes or frees which could potentially lead to code corruption, control-flow hijack, or information leak attack.

Solutions

FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

Adobe.Flash.h264.Decoding.Heap.Overflow
Released Feb 09, 2017

Users should apply the solution provided by Adobe.

Acknowledgement

This vulnerability was discovered by Kai Lu of Fortinet's FortiGuard Labs

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.