krb5 -- RFC 3961 key-derivation checksum handling vulnerability

The MIT Kerberos team reports: MIT krb5 releases incorrectly accepts RFC 3961 key-derivation checksums using RC4 keys when verifying AD-SIGNEDPATH and AD-KDC-ISSUED authorization data. An authenticated remote attacker that controls a legitimate service principal has a 1/256 chance of forging the...