Zero-Day Advisory

Fortinet Discovers Remote Code Execution Vulnerability in D-Link DIR868

Summary

Fortinet's FortiGuard Labs has discovered an unauthenticated remote code execution vulnerability in the DIR868 routers shipped by the company D-Link.


D-Link manufactures a series of network routers directly competing with Linksys and Asus routers.


A malicious user can forge an authentication request that will trigger an unauthenticated buffer overflow thus allowing remote code execution with higher privileges on the vulnerable devices.


Solutions

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

D-Link.DIR.800.Buffer.Overflow
Released Oct 18, 2017

Upgrade to version 1.21.

Timeline

Fortinet reported the vulnerability to D-Link on August 25, 2017.

D-Link confirmed the vulnerability on November 23, 2017.

D-Link patched the vulnerability on February 8, 2018.

References

Acknowledgement

This vulnerability was discovered by Tony Loi 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.