Fortinet Discovers Corel PhotoPaint Memory Corruption Vulnerability


Fortinet's FortiGuard Labs has discovered a Memory Corruption vulnerability in Corel PhotoPaint Standard 2020.

Corel PhotoPaint Standard is a commercial photo-editing and pixel-based design program by Corel. It is part of the CorelDRAW Essentials, CorelDRAW Standard and CorelDRAW Graphics Suite 2021 suite of applications. It is an advanced photo-editing application that provides realistic special effects, photo painting and retouching. In addition, PHOTO-PAINT offers bitmap creation, digital painting, RAW image editing and streamlined web exporting capabilities.

A memory corruption vulnerability has been discovered in Corel PhotoPaint Standard 2020. The vulnerability is caused by a crafted "CPT" file which causes an out-of-bounds write memory access. It could allow malicious users to create remote code execution scenarios.


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

Released May 19, 2021

No solution has been provided by the vendor.


Fortinet reported the vulnerability to Corel on March 4, 2021.

Fortinet requested (First Notice) for an update on March 9, 2021.

Fortinet requested (Second Notice) for an update on March 22, 2021.

Fortinet requested (Third & Final Notice) for an update on April 5, 2021.

Corel responded and acknowledged receipt of vulnerability on April 12, 2021.

Fortinet requested for an update on May 12, 2021.

Fortinet requested for an update on May 21, 2021.

Fortinet requested for an update on July 15, 2021.

Fortinet notified the vendor with intent to Publish 0-Day Vulnerability Advisory and/or Blog on September 21, 2021.

Fortinet releases advisory on September 29, 2021.


This vulnerability was discovered by Kushal Arvind Shah 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.