Fedora has released security update for dnsdist to fix the vulnerability.
This vulnerability could be exploited to gain partial access to sensitive information. Malicious users could also use this vulnerability to change partial contents or configuration on the system. Additionally this vulnerability can also be used to cause a limited denial of service in the form of interruptions in resource availability.
Fedora has issued updated packages to fix this vulnerability. Updates can be installed using the yum utility, which can be downloaded from the Fedora Web site.
For more information about the vulnerability and obtaining patches, refer to the following Fedora security advisories :
Fedora 25 Update
Following are links for downloading patches to fix the vulnerabilities: