Zero-Day Advisory

Fortinet Discovers Adobe Flash Player ATF Handling Heap Overflow Vulnerability


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.
A heap overflow vulnerability has been discovered in Flash Player when processing Adobe Texture Format (ATF). The vulnerability can be triggered by a specifically crafted ATF file which causes an out of bounds memory access, due to improper bounds checking when manipulating a pointer to a heap allocated buffer. Attackers can exploit the vulnerability by using the out of bounds access for unintended reads, writes or frees -- potentially leading to code corruption, control-flow hijack, or information leak attack.


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

Released Jan 06, 2017

Users should apply the solution provided by Adobe.

Additional Information

The affected Flash Player versions are and earlier.

The vulnerability is fixed in Flash Player version


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.