auth-pam: Check the user didn't change during PAM transaction #521
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PAM modules can change the user during their execution, in such case ssh would still use the user that has been provided giving potentially access to another user with the credentials of another one. So prevent this to happen, by ensuring that the final PAM user is matching the one that initiated the transaction.
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PAM modules can change the user during their execution, in such case ssh would still use the user that has been provided giving potentially access to another user with the credentials of another one.
So prevent this to happen, by ensuring that the final PAM user is matching the one that initiated the transaction.
Similar to util-linux/util-linux#3206 and sudo-project/sudo#412