Zero-Day Advisory

Fortinet Discovers Stack Buffer Overflow in DGN2200 UPNP Handler

Summary

Fortinet's FortiGuard Labs has discovered multiple stack-based buffer overflows in Netgear DGN2200.

Netgear is a global computer networking company based in San Jose, California, in the United States. It produces networking hardware for consumers, businesses, and service providers

There are multiple stack buffer overflow issues in Netgear's Universal Plug & Play (UPNP) routines. These routines do not assess the boundary of the user input before manipulating the arbitrary data that could be sent directly via HTTP request.

Solutions

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

Netgear.DGN2200.UPNP.Buffer.Overflow
Released Mar 15, 2018

Users should apply latest update from the vendor

Timeline

Fortinet reported the vulnerability to Netgear on 12, February 2018

Netgear confirmed the vulnerability on 13, February 2018

Netgear released patch for the vulnerability on 12, March 2019

References

• https://kb.netgear.com/000060628/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-Modem-Routers-and-Extenders-PSV-2018-0054

Acknowledgement

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.