Package: libapache2-mod-auth-kerb Version: 5.4-2.2 Severity: normal Let's assume the following sample VirtualHost configuration.
<VirtualHost *:80> ServerName testwww.foo.bar ServerAdmin webmaster@localhost DocumentRoot /home/apache/http_root/testwww/public <Directory /home/apache/http_root/testwww> AuthType Kerberos AuthName "Please login to proceed" KrbAuthRealms FOO.BAR KrbServiceName HTTP Krb5Keytab /etc/apache2/apache.keytab KrbMethodNegotiate on KrbMethodK5Passwd on KrbLocalUserMapping On Require valid-user </Directory> </VirtualHost> When web browser uses "negotiate" authentication method, everything works fine. But when apache tries to perform "K5Passwd" method via acquiring plain login and password from user, the auth_kerb module reads incorrect keytab. It should use "Krb5Keytab" file defined in config. In my example it is "/etc/apache2/apache.keytab". But in fact the module reads the system default keytab instead. Usually it is placed in "/etc/krb5.keytab". So, mod_auth_kerb ignores the directive "Krb5Keytab" while checking against plain login and password, provided by user. Thus, in the case when apache configured keytab differs from the system default keytab, the same user on the same machine in the same time successfully signs in via SPNEGO and fails to authenticate via login and password. I beleive this is a bug. -- System Information: Debian Release: 8.2 APT prefers stable APT policy: (500, 'stable') Architecture: i386 (i686) Kernel: Linux 3.16.0-4-686-pae (SMP w/1 CPU core) Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages libapache2-mod-auth-kerb depends on: ii apache2-bin [apache2-api-20120211] 2.4.10-10+deb8u3 ii krb5-config 2.3 ii libc6 2.19-18+deb8u1 ii libcomerr2 1.42.12-1.1 ii libgssapi-krb5-2 1.12.1+dfsg-19 ii libk5crypto3 1.12.1+dfsg-19 ii libkrb5-3 1.12.1+dfsg-19 libapache2-mod-auth-kerb recommends no packages. libapache2-mod-auth-kerb suggests no packages. -- no debconf information