readd audit patch
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Ray Strode
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4fedc6e54a
commit
5c37e637e3
171
gdm-2.17.6-audit-login.patch
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171
gdm-2.17.6-audit-login.patch
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@ -0,0 +1,171 @@
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--- gdm-2.17.6/configure.ac.audit-login 2007-01-30 16:21:18.000000000 -0500
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+++ gdm-2.17.6/configure.ac 2007-02-07 22:27:55.000000000 -0500
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@@ -825,6 +825,10 @@
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AC_SUBST(logdir, ${localstatedir}/log/gdm)
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AC_SUBST(pixmapdir, ${datadir}/pixmaps)
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+AC_ARG_WITH(libaudit,
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+ [ --with-libaudit=[auto/yes/no] Add Linux audit support [default=auto]],,
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+ with_libaudit=auto)
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+
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withval=""
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AC_ARG_WITH(at-bindir,
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[ --with-at-bindir=<PATH> PATH to Accessible Technology programs [default=BINDIR]],)
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@@ -936,6 +940,24 @@
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AC_MSG_RESULT(no)
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fi
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+# Check for Linux auditing API
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+#
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+# libaudit detection
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+if test x$with_libaudit = xno ; then
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+ have_libaudit=no;
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+else
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+ # See if we have audit daemon library
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+ AC_CHECK_LIB(audit, audit_log_user_message,
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+ have_libaudit=yes, have_libaudit=no)
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+fi
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+
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+AM_CONDITIONAL(HAVE_LIBAUDIT, test x$have_libaudit = xyes)
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+
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+if test x$have_libaudit = xyes ; then
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+ EXTRA_DAEMON_LIBS="$EXTRA_DAEMON_LIBS -laudit"
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+ AC_DEFINE(HAVE_LIBAUDIT,1,[linux audit support])
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+fi
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+
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# Check for Solaris auditing API
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# Note, Solaris auditing not supported for Solaris 9 or earlier and
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# should not be used on these versions of Solaris if auditing is
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--- gdm-2.17.6/daemon/verify-pam.c.audit-login 2007-02-07 22:05:17.000000000 -0500
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+++ gdm-2.17.6/daemon/verify-pam.c 2007-02-07 22:30:55.000000000 -0500
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@@ -47,6 +47,14 @@
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#include <bsm/adt_event.h>
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#endif /* HAVE_ADT */
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+#define AU_FAILED 0
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+#define AU_SUCCESS 1
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+#ifdef HAVE_LIBAUDIT
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+#include <libaudit.h>
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+#else
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+#define log_to_audit_system(l,h,d,s) do { ; } while (0)
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+#endif
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+
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/* Evil, but this way these things are passed to the child session */
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static pam_handle_t *pamh = NULL;
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@@ -784,6 +792,53 @@
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return TRUE;
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}
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+/**
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+ * log_to_audit_system:
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+ * @login: Name of user
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+ * @hostname: Name of host machine
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+ * @tty: Name of display
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+ * @success: 1 for success, 0 for failure
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+ *
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+ * Logs the success or failure of the login attempt with the linux kernel
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+ * audit system. The intent is to capture failed events where the user
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+ * fails authentication or otherwise is not permitted to login. There are
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+ * many other places where pam could potentially fail and cause login to
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+ * fail, but these are system failures rather than the signs of an account
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+ * being hacked.
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+ *
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+ * Returns nothing.
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+ */
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+
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+#ifdef HAVE_LIBAUDIT
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+static void
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+log_to_audit_system(const char *login,
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+ const char *hostname,
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+ const char *tty,
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+ gboolean success)
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+{
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+ struct passwd *pw;
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+ char buf[64];
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+ int audit_fd;
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+
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+ audit_fd = audit_open();
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+ if (login)
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+ pw = getpwnam(login);
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+ else {
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+ login = "unknown";
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+ pw = NULL;
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+ }
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+ if (pw) {
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+ snprintf(buf, sizeof(buf), "uid=%d", pw->pw_uid);
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+ audit_log_user_message(audit_fd, AUDIT_USER_LOGIN,
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+ buf, hostname, NULL, tty, (int)success);
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+ } else {
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+ snprintf(buf, sizeof(buf), "acct=%s", login);
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+ audit_log_user_message(audit_fd, AUDIT_USER_LOGIN,
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+ buf, hostname, NULL, tty, (int)success);
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+ }
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+ close(audit_fd);
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+}
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+#endif
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/**
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* gdm_verify_user:
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@@ -903,6 +958,9 @@
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/* Start authentication session */
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did_we_ask_for_password = FALSE;
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if ((pamerr = pam_authenticate (pamh, null_tok)) != PAM_SUCCESS) {
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+ /* Log the failed login attempt */
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+ log_to_audit_system(login, d->hostname, display, AU_FAILED);
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+
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if ( ! ve_string_empty (selected_user)) {
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pam_handle_t *tmp_pamh;
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@@ -1024,6 +1082,8 @@
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( ! gdm_get_value_bool (GDM_KEY_ALLOW_REMOTE_ROOT) && ! local) ) &&
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pwent != NULL &&
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pwent->pw_uid == 0) {
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+ /* Log the failed login attempt */
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+ log_to_audit_system(login, d->hostname, display, AU_FAILED);
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gdm_error (_("Root login disallowed on display '%s'"),
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display);
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gdm_slave_greeter_ctl_no_ret (GDM_ERRBOX,
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@@ -1057,6 +1117,8 @@
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break;
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case PAM_NEW_AUTHTOK_REQD :
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if ((pamerr = pam_chauthtok (pamh, PAM_CHANGE_EXPIRED_AUTHTOK)) != PAM_SUCCESS) {
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+ /* Log the failed login attempt */
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+ log_to_audit_system(login, d->hostname, display, AU_FAILED);
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gdm_error (_("Authentication token change failed for user %s"), login);
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gdm_slave_greeter_ctl_no_ret (GDM_ERRBOX,
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_("\nThe change of the authentication token failed. "
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@@ -1074,18 +1136,24 @@
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#endif /* HAVE_ADT */
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break;
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case PAM_ACCT_EXPIRED :
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+ /* Log the failed login attempt */
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+ log_to_audit_system(login, d->hostname, display, AU_FAILED);
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gdm_error (_("User %s no longer permitted to access the system"), login);
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gdm_slave_greeter_ctl_no_ret (GDM_ERRBOX,
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_("\nThe system administrator has disabled your account."));
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error_msg_given = TRUE;
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goto pamerr;
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case PAM_PERM_DENIED :
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+ /* Log the failed login attempt */
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+ log_to_audit_system(login, d->hostname, display, AU_FAILED);
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gdm_error (_("User %s not permitted to gain access at this time"), login);
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gdm_slave_greeter_ctl_no_ret (GDM_ERRBOX,
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_("\nThe system administrator has disabled access to the system temporarily."));
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error_msg_given = TRUE;
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goto pamerr;
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default :
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+ /* Log the failed login attempt */
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+ log_to_audit_system(login, d->hostname, display, AU_FAILED);
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if (gdm_slave_action_pending ())
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gdm_error (_("Couldn't set acct. mgmt for %s"), login);
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goto pamerr;
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@@ -1137,6 +1205,8 @@
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gdm_error (_("Couldn't open session for %s"), login);
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goto pamerr;
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}
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+ /* Login succeeded */
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+ log_to_audit_system(login, d->hostname, display, AU_SUCCESS);
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/* Workaround to avoid gdm messages being logged as PAM_pwdb */
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closelog ();
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