Zero-Day Advisory

Fortinet Discovers Adobe Photoshop Memory Corruption Vulnerability

Summary

Fortinet's FortiGuard Labs has discovered a memory corruption vulnerability in Adobe Photoshop.

Adobe Photoshop is a raster graphics editor developed and published by Adobe Systems. Photoshop has become the de facto industry standard in raster graphics editing. It can edit and compose raster images in multiple layers and supports masks, alpha compositing and several color models including RGB, CMYK, CIELAB, spot color and duotone. Photoshop has vast support for graphic file formats but also uses its own PSD and PSB file formats which support all the aforementioned features. In addition to raster graphics, it has limited abilities to edit or render text, vector graphics (especially through clipping path), 3D graphics and video.

A memory corruption vulnerability has been discovered in Adobe Photoshop. The vulnerability can be triggered by a crafted file which causes an out-of-bounds write, due to improper bounds checking. Successful exploitation of this vulnerability could grant an attacker remote code execution.

Solutions

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

Adobe.Photoshop.SVG.File.Memory.Corruption
Released Nov 02, 2017

Users should apply the solution provided by Adobe.

Additional Information

Fortinet reported the vulnerability to Adobe on Sep. 11, 2017.

Adobe confirmed the vulnerability on Nov. 1, 2017.

Adobe patched the vulnerability on Nov. 14, 2017.

References

• https://helpx.adobe.com/security/products/photoshop/apsb17-34.html
  

• CVE-2017-11303

Acknowledgement

This vulnerability was discovered by Honggang Ren 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.