Zero-Day Advisory

Fortinet Discovers Kaspersky Self-Defence Bypass Vulnerability


Fortinet's FortiGuard Labs has discovered a security bypass issue in Kaspersky Internet Security 2017.

Kaspersky Internet Security (KIS) is an internet security suite developed by Kaspersky Lab compatible with Microsoft Windows and Mac OS X. KIS offers protection from malware, as well as email spam, phishing and hacking attempts, and data leaks.

The self-defense driver bypass issue has been discovered in Kaspersky Internet Security 2017. The bypass takes advantage of Application Verifier DLL side loading method in order to load arbitrary payload DLL into Kaspersky core services like AVP.exe, which in turn allows attackers to bypass Kaspersky protection completely.


Users should apply the solution provided by Kaspersky.

Additional Information

Fortinet reported the vulnerability to Kaspersky on June 27, 2017.

Kaspersky patched the vulnerability on July 25, 2017.


This vulnerability was discovered by Wayne Low 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.