"rebbel used to be in a gang and was suspected of burglary. Withdrawn, your Honor." Why are lawyers permitted to say things like that?

In trials you hear these things being said.
The lawyer states that a witness or a suspect has done something earlier in life that could possible contradict his/her statement or shows that he/she is not reliable.
The lawyer knows that he isn’t allowed to do that but he does it anyway.
He/she just adds that line: ”Withdrawn, your Honor.”
Now the people in the jury also know about the fact that wasn’t supposed to be brought in to the public with the possible (probable?) danger that they will let that fact weight in their decision.
Why does the law not prevent lawyers from doing this?
Or does the law do it?
Are there maybe penalties that I am not aware off?