Cardiff were on top when Newcastle substitute Isaac Hayden was shown a straight red card after 65 minutes.
Javier Manquillo was booked for fouling Murphy, and Newcastle could have been down to 10 men when, shortly after the half-hour, Kenedy kicked out at Victor Camarasa but referee Craig Pawson missed the offence.
For the match, Etheridge stopped six of Newcastle's shots on goal, including four in the first half.
Cardiff, beaten at Bournemouth in their first game, will rue a missed opportunity to claim three priceless points in what is likely to prove a season-long battle to avoid relegation.
FC Barcelona President Refuses To Rule Out Paul Pogba Move
The Frenchman's comments show that this isn't the case, and Mourinho is said to blame the strain on Pogba's agent Mino Raiola. There are still 20 days left, we will see which players can leave and which players can come.
Leicester City striker Jamie Vardy was sent off during Leicester's win over Wolverhampton Wanderers on Saturday after a unsafe challenge on right-back Matt Doherty.
Kenneth Zohore wasted a golden chance to put Cardiff in front soon after half-time when the unmarked striker met Joe Ralls' cross with a dismal header that drifted wide from close-range.
Newcastle sent on Jacob Murphy to share the same pitch with his twin Josh and provide a real football rarity.
You'll seldom see a better debut than this.
We look back at a forgettable display for the 22-year-old.
They were more than good value for a point, which made it very harsh when the penalty was awarded despite it being a clear handball.