ClamAV stopped downloading new pattern upgrades

Products

• ISG Content Analysis

Issue/Introduction

ClamAV stopped downloading new pattern upgrades. It stuck on old version. Forcing updates or restarting services or device does not help

Environment

• Content Analysis 3.2+

Cause

Custom static route conflicts with docker network.

Following errors can be observed:

clam-0.log

Container started: xxx
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? 

/var/log/messages

xxx cas.example.com info dockerd[19091]: failed to start daemon: Error initializing network controller: list bridge addresses failed: PredefinedLocalScopeDefaultNetworks List: [172.31.16.0/20 172.31.32.0/20 172.31.48.0/20 172.31.64.0/20]: no available network 

Resolution

Remove/modify any conflicting static routes that could affect following docker network subnets:

• 172.31.16.0/20
• 172.31.32.0/20
• 172.31.48.0/20
• 172.31.64.0/20