krb5: kpropd unexpected termination on invalid input (MITKRB5-SA-2011-001)

The dostandalone function in the MIT krb5 KDC database propagation daemon kpropd in Kerberos 1.7, 1.8, and 1.9, when running in standalone mode, does not properly handle when a worker child process "exits abnormally," which allows remote attackers to cause a denial of service listening process...