How to pass the command injection vulnerability fix Yahoo subsidiary production servers-vulnerability warning-the black bar safety net

One, Foreword Time to get back to 5 May 20, the night before that, I spent several days time to study the Yahoo Messenger app, still can't figure out how it works, but annoying headache and neck pain and looking for me. So I decided to go for a walk, find a new target. Then I noticed a very...