Zero-Day Advisory

Fortinet Discovers Bitdefender AVC3 Driver Local Privilege Escalation


Fortinet's FortiGuard Labs has discovered a denial-of-service attack on Avc3.sys via IOCTL code 0x2222F4. The attack can only be reproduced by chaining multiple calls to 0x2222F4 IOCTL code. The vulnerability could result in local privilege escalation upon successful exploitation by attackers.


Bitdefender's user should apply latest updates from the vendor


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.