Zero-Day Advisory

Fortinet Discovers IBM Spectrum Scale Remote DoS Vulnerability


Fortinet's FortiGuard Labs has discovered a denial of service (DoS) vulnerability in IBM Spectrum Scale.

IBM Spectrum Scale is a high-performance solution for managing data at scale with the distinctive ability to perform archive and analytics in place.

A vulnerability has been discovered in IBM Spectrum Scale due to incorrectly processing specially crafted network packet, An attacker can force the Spectrum Scale mmfsd/mmsdrserv daemons to unexpectedly exit. It could impact the functionality of the Spectrum Scale cluster and the availability of file systems managed by Spectrum Scale.


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

Released Feb 20, 2020

Users should apply the solution provided by IBM.


Fortinet reported the vulnerability to IBM on December 5, 2019.

IBM released patch for it on March 8, 2020.


This vulnerability was discovered by Honggang Ren 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.