This update for krb5 fixes the following security issue:
{
    "binaries": [
        {
            "krb5-server": "1.6.3-133.49.109.1",
            "krb5-x86": "1.6.3-133.49.109.1",
            "krb5-apps-servers": "1.6.3-133.49.109.1",
            "krb5-apps-clients": "1.6.3-133.49.109.1",
            "krb5-client": "1.6.3-133.49.109.1",
            "krb5-32bit": "1.6.3-133.49.109.1",
            "krb5": "1.6.3-133.49.109.1"
        }
    ]
}{
    "binaries": [
        {
            "krb5-server": "1.6.3-133.49.109.1",
            "krb5-x86": "1.6.3-133.49.109.1",
            "krb5-apps-servers": "1.6.3-133.49.109.1",
            "krb5-apps-clients": "1.6.3-133.49.109.1",
            "krb5-client": "1.6.3-133.49.109.1",
            "krb5-32bit": "1.6.3-133.49.109.1",
            "krb5": "1.6.3-133.49.109.1"
        }
    ]
}