Harden vigil.service

[williamdes]

See: systemd-analyze security vigil

I wonder if I shoud add EnvironmentFile=/etc/vigil/.env as a comment

[williamdes]

  NAME                                                        DESCRIPTION                                                               EXPOSURE
✓ SystemCallFilter=~@swap                                     System call deny list defined for service, and @swap is included                  
✓ SystemCallFilter=~@resources                                System call deny list defined for service, and @resources is included             
✓ SystemCallFilter=~@reboot                                   System call deny list defined for service, and @reboot is included                
✓ SystemCallFilter=~@raw-io                                   System call deny list defined for service, and @raw-io is included                
✓ SystemCallFilter=~@privileged                               System call deny list defined for service, and @privileged is included            
✓ SystemCallFilter=~@obsolete                                 System call deny list defined for service, and @obsolete is included              
✓ SystemCallFilter=~@mount                                    System call deny list defined for service, and @mount is included                 
✓ SystemCallFilter=~@module                                   System call deny list defined for service, and @module is included                
✓ SystemCallFilter=~@debug                                    System call deny list defined for service, and @debug is included                 
✓ SystemCallFilter=~@cpu-emulation                            System call deny list defined for service, and @cpu-emulation is included         
✓ SystemCallFilter=~@clock                                    System call deny list defined for service, and @clock is included                 
✓ RemoveIPC=                                                  Service user cannot leave SysV IPC objects around                                 
✗ RootDirectory=/RootImage=                                   Service runs within the host's root directory                                  0.1
✓ User=/DynamicUser=                                          Service runs under a static non-root user identity                                
✓ RestrictRealtime=                                           Service realtime scheduling access is restricted                                  
✓ CapabilityBoundingSet=~CAP_SYS_TIME                         Service processes cannot change the system clock                                  
✓ NoNewPrivileges=                                            Service processes cannot acquire new privileges                                   
✗ AmbientCapabilities=                                        Service process receives ambient capabilities                                  0.1
✓ CapabilityBoundingSet=~CAP_BPF                              Service may load BPF programs                                                     
✓ SystemCallArchitectures=                                    Service may execute system calls only with native ABI                             
✗ RestrictAddressFamilies=~AF_(INET|INET6)                    Service may allocate Internet sockets                                          0.3
✓ ProtectSystem=                                              Service has strict read-only access to the OS file hierarchy                      
✓ ProtectProc=                                                Service has restricted access to process tree (/proc hidepid=)                    
✓ SupplementaryGroups=                                        Service has no supplementary groups                                               
✓ CapabilityBoundingSet=~CAP_SYS_RAWIO                        Service has no raw I/O access                                                     
✓ CapabilityBoundingSet=~CAP_SYS_PTRACE                       Service has no ptrace() debugging abilities                                       
✓ CapabilityBoundingSet=~CAP_SYS_(NICE|RESOURCE)              Service has no privileges to change resource use parameters                       
✓ CapabilityBoundingSet=~CAP_NET_ADMIN                        Service has no network configuration privileges                                   
✓ CapabilityBoundingSet=~CAP_AUDIT_*                          Service has no audit subsystem access                                             
✓ CapabilityBoundingSet=~CAP_SYS_ADMIN                        Service has no administrator privileges                                           
✓ PrivateTmp=                                                 Service has no access to other software's temporary files                         
✓ ProcSubset=                                                 Service has no access to non-process /proc files (/proc subset=)                  
✓ CapabilityBoundingSet=~CAP_SYSLOG                           Service has no access to kernel logging                                           
✓ ProtectHome=                                                Service has no access to home directories                                         
✓ PrivateDevices=                                             Service has no access to hardware devices                                         
✗ CapabilityBoundingSet=~CAP_NET_(BIND_SERVICE|BROADCAST|RAW) Service has elevated networking privileges                                     0.1
✗ PrivateNetwork=                                             Service has access to the host's network                                       0.5
✗ PrivateUsers=                                               Service has access to other users                                              0.2
✗ DeviceAllow=                                                Service has a device ACL with some special devices: char-rtc:r                 0.1
✓ KeyringMode=                                                Service doesn't share key material with other services                            
✓ Delegate=                                                   Service does not maintain its own delegated control group subtree                 
✗ IPAddressDeny=                                              Service does not define an IP address allow list                               0.2
✓ NotifyAccess=                                               Service child processes cannot alter service state                                
✓ ProtectClock=                                               Service cannot write to the hardware clock or system clock                        
✓ CapabilityBoundingSet=~CAP_SYS_PACCT                        Service cannot use acct()                                                         
✓ CapabilityBoundingSet=~CAP_KILL                             Service cannot send UNIX signals to arbitrary processes                           
✓ ProtectKernelLogs=                                          Service cannot read from or write to the kernel log ring buffer                   
✓ CapabilityBoundingSet=~CAP_WAKE_ALARM                       Service cannot program timers that wake up the system                             
✓ CapabilityBoundingSet=~CAP_(DAC_*|FOWNER|IPC_OWNER)         Service cannot override UNIX file/IPC permission checks                           
✓ ProtectControlGroups=                                       Service cannot modify the control group file system                               
✓ CapabilityBoundingSet=~CAP_LINUX_IMMUTABLE                  Service cannot mark files immutable                                               
✓ CapabilityBoundingSet=~CAP_IPC_LOCK                         Service cannot lock memory into RAM                                               
✓ ProtectKernelModules=                                       Service cannot load or read kernel modules                                        
✓ CapabilityBoundingSet=~CAP_SYS_MODULE                       Service cannot load kernel modules                                                
✓ CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG                   Service cannot issue vhangup()                                                    
✓ CapabilityBoundingSet=~CAP_SYS_BOOT                         Service cannot issue reboot()                                                     
✓ CapabilityBoundingSet=~CAP_SYS_CHROOT                       Service cannot issue chroot()                                                     
✓ PrivateMounts=                                              Service cannot install system mounts                                              
✓ CapabilityBoundingSet=~CAP_BLOCK_SUSPEND                    Service cannot establish wake locks                                               
✓ MemoryDenyWriteExecute=                                     Service cannot create writable executable memory mappings                         
✓ RestrictNamespaces=~user                                    Service cannot create user namespaces                                             
✓ RestrictNamespaces=~pid                                     Service cannot create process namespaces                                          
✓ RestrictNamespaces=~net                                     Service cannot create network namespaces                                          
✓ RestrictNamespaces=~uts                                     Service cannot create hostname namespaces                                         
✓ RestrictNamespaces=~mnt                                     Service cannot create file system namespaces                                      
✓ CapabilityBoundingSet=~CAP_LEASE                            Service cannot create file leases                                                 
✓ CapabilityBoundingSet=~CAP_MKNOD                            Service cannot create device nodes                                                
✓ RestrictNamespaces=~cgroup                                  Service cannot create cgroup namespaces                                           
✓ RestrictNamespaces=~ipc                                     Service cannot create IPC namespaces                                              
✓ ProtectHostname=                                            Service cannot change system host/domainname                                      
✓ CapabilityBoundingSet=~CAP_(CHOWN|FSETID|SETFCAP)           Service cannot change file ownership/access mode/capabilities                     
✓ CapabilityBoundingSet=~CAP_SET(UID|GID|PCAP)                Service cannot change UID/GID identities/capabilities                             
✓ LockPersonality=                                            Service cannot change ABI personality                                             
✓ ProtectKernelTunables=                                      Service cannot alter kernel tunables (/proc/sys, …)                               
✓ RestrictAddressFamilies=~AF_PACKET                          Service cannot allocate packet sockets                                            
✓ RestrictAddressFamilies=~AF_NETLINK                         Service cannot allocate netlink sockets                                           
✓ RestrictAddressFamilies=~AF_UNIX                            Service cannot allocate local sockets                                             
✓ RestrictAddressFamilies=~…                                  Service cannot allocate exotic sockets                                            
✓ CapabilityBoundingSet=~CAP_MAC_*                            Service cannot adjust SMACK MAC                                                   
✓ RestrictSUIDSGID=                                           SUID/SGID file creation by service is restricted                                  
✗ UMask=                                                      Files created by service are world-readable by default                         0.1

→ Overall exposure level for vigil.service: 1.4 OK 🙂

[williamdes]

What do you think about this one @valeriansaliou?

[valeriansaliou]

I unfortunately won’t have much time to process this over the coming days but it looks good, thanks! Really busy on other projects atm. 🥲

[williamdes]

Hello @valeriansaliou
Can you process this PR ?
It has been working fine since months on my server, maybe try it out on yours ?