A witness at the scene said the man who was attacked appeared to be in shock as he was treated by ambulance officers,but his injuries did not appear serious.
The witness said volunteers and officials from Abbott’s campaign arrived quickly on the scene to assist him.
The race for Warringah has seen accusations of dirty tricks and foul play from both sides,escalating in recent days.
The former prime minister sits on a margin of 11 per cent but faces a strong challenge from former Olympian Steggall,who is campaigning on a platform of action on climate change.
During the campaign,Ms Steggall’s ex-husband has been reported criticising her,signs bearing Mr Abbott’s face with obscenities written on them have been posted publicly throughout the area,and faeces was found near Mr Abbott’s electoral office.