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290 lines
8.1 KiB
290 lines
8.1 KiB
6 years ago
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diff -up shadow-4.1.5.1/src/chgpasswd.c.selinux-perms shadow-4.1.5.1/src/chgpasswd.c
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--- shadow-4.1.5.1/src/chgpasswd.c.selinux-perms 2016-05-04 13:44:55.633787764 +0200
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+++ shadow-4.1.5.1/src/chgpasswd.c 2016-05-30 12:01:30.421587253 +0200
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@@ -39,6 +39,13 @@
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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+#ifdef WITH_SELINUX
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+#include <selinux/selinux.h>
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+#include <selinux/avc.h>
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+#endif
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+#ifdef WITH_LIBAUDIT
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+#include <libaudit.h>
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+#endif
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#ifdef ACCT_TOOLS_SETUID
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#ifdef USE_PAM
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#include "pam_defs.h"
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@@ -76,6 +83,9 @@ static bool sgr_locked = false;
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#endif
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static bool gr_locked = false;
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+/* The name of the caller */
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+static char *myname = NULL;
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+
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/* local function prototypes */
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static void fail_exit (int code);
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static /*@noreturn@*/void usage (int status);
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@@ -300,6 +310,63 @@ static void check_perms (void)
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#endif /* ACCT_TOOLS_SETUID */
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}
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+#ifdef WITH_SELINUX
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+static int
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+log_callback (int type, const char *fmt, ...)
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+{
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+ int audit_fd;
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+ va_list ap;
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+
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+ va_start(ap, fmt);
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+#ifdef WITH_AUDIT
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+ audit_fd = audit_open();
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+
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+ if (audit_fd >= 0) {
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+ char *buf;
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+
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+ if (vasprintf (&buf, fmt, ap) < 0)
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+ goto ret;
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+ audit_log_user_avc_message(audit_fd, AUDIT_USER_AVC, buf, NULL, NULL,
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+ NULL, 0);
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+ audit_close(audit_fd);
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+ free(buf);
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+ goto ret;
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+ }
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+
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+#endif
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+ vsyslog (LOG_USER | LOG_INFO, fmt, ap);
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+ret:
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+ va_end(ap);
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+ return 0;
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+}
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+
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+static void
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+selinux_check_root (void)
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+{
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+ int status = -1;
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+ security_context_t user_context;
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+ union selinux_callback old_callback;
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+
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+ if (is_selinux_enabled() < 1)
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+ return;
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+
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+ old_callback = selinux_get_callback(SELINUX_CB_LOG);
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+ /* setup callbacks */
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+ selinux_set_callback(SELINUX_CB_LOG, (union selinux_callback) &log_callback);
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+ if ((status = getprevcon(&user_context)) < 0) {
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+ selinux_set_callback(SELINUX_CB_LOG, old_callback);
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+ exit(1);
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+ }
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+
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+ status = selinux_check_access(user_context, user_context, "passwd", "passwd", NULL);
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+
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+ selinux_set_callback(SELINUX_CB_LOG, old_callback);
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+ freecon(user_context);
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+ if (status != 0 && security_getenforce() != 0)
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+ exit(1);
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+}
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+#endif
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+
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/*
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* open_files - lock and open the group databases
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*/
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@@ -393,6 +460,7 @@ int main (int argc, char **argv)
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const struct group *gr;
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struct group newgr;
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+ struct passwd *pw = NULL;
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int errors = 0;
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int line = 0;
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@@ -408,8 +476,33 @@ int main (int argc, char **argv)
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OPENLOG ("chgpasswd");
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+#ifdef WITH_AUDIT
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+ audit_help_open ();
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+#endif
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+
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+ /*
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+ * Determine the name of the user that invoked this command. This
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+ * is really hit or miss because there are so many ways that command
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+ * can be executed and so many ways to trip up the routines that
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+ * report the user name.
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+ */
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+ pw = get_my_pwent ();
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+ if (NULL == pw) {
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+ fprintf (stderr, _("%s: Cannot determine your user name.\n"),
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+ Prog);
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+ SYSLOG ((LOG_WARN,
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+ "Cannot determine the user name of the caller (UID %lu)",
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+ (unsigned long) getuid ()));
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+ exit (E_NOPERM);
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+ }
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+ myname = xstrdup (pw->pw_name);
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+
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check_perms ();
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+#ifdef WITH_SELINUX
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+ selinux_check_root ();
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+#endif
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+
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#ifdef SHADOWGRP
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is_shadow_grp = sgr_file_present ();
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#endif
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@@ -533,6 +626,15 @@ int main (int argc, char **argv)
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newgr.gr_passwd = cp;
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}
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+#ifdef WITH_AUDIT
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+ {
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+
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+ audit_logger_with_group (AUDIT_GRP_CHAUTHTOK, Prog,
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+ "change-password",
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+ myname, AUDIT_NO_ID, gr->gr_name,
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+ SHADOW_AUDIT_SUCCESS);
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+ }
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+#endif
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/*
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* The updated group file entry is then put back and will
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* be written to the group file later, after all the
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diff -up shadow-4.1.5.1/src/chpasswd.c.selinux-perms shadow-4.1.5.1/src/chpasswd.c
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--- shadow-4.1.5.1/src/chpasswd.c.selinux-perms 2016-05-04 13:44:55.633787764 +0200
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+++ shadow-4.1.5.1/src/chpasswd.c 2016-05-30 12:01:42.877859957 +0200
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@@ -39,6 +39,13 @@
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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+#ifdef WITH_SELINUX
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+#include <selinux/selinux.h>
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+#include <selinux/avc.h>
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+#endif
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+#ifdef WITH_LIBAUDIT
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+#include <libaudit.h>
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+#endif
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#ifdef USE_PAM
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#include "pam_defs.h"
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#endif /* USE_PAM */
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@@ -297,6 +304,63 @@ static void check_perms (void)
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#endif /* USE_PAM */
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}
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+#ifdef WITH_SELINUX
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+static int
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+log_callback (int type, const char *fmt, ...)
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+{
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+ int audit_fd;
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+ va_list ap;
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+
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+ va_start(ap, fmt);
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+#ifdef WITH_AUDIT
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+ audit_fd = audit_open();
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+
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+ if (audit_fd >= 0) {
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+ char *buf;
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+
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+ if (vasprintf (&buf, fmt, ap) < 0)
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+ goto ret;
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+ audit_log_user_avc_message(audit_fd, AUDIT_USER_AVC, buf, NULL, NULL,
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+ NULL, 0);
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+ audit_close(audit_fd);
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+ free(buf);
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+ goto ret;
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+ }
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+
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+#endif
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+ vsyslog (LOG_USER | LOG_INFO, fmt, ap);
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+ret:
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+ va_end(ap);
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+ return 0;
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+}
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+
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+static void
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+selinux_check_root (void)
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+{
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+ int status = -1;
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+ security_context_t user_context;
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+ union selinux_callback old_callback;
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+
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+ if (is_selinux_enabled() < 1)
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+ return;
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+
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+ old_callback = selinux_get_callback(SELINUX_CB_LOG);
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+ /* setup callbacks */
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+ selinux_set_callback(SELINUX_CB_LOG, (union selinux_callback) &log_callback);
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+ if ((status = getprevcon(&user_context)) < 0) {
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+ selinux_set_callback(SELINUX_CB_LOG, old_callback);
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+ exit(1);
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+ }
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+
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+ status = selinux_check_access(user_context, user_context, "passwd", "passwd", NULL);
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+
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+ selinux_set_callback(SELINUX_CB_LOG, old_callback);
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+ freecon(user_context);
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+ if (status != 0 && security_getenforce() != 0)
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+ exit(1);
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+}
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+#endif
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+
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/*
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* open_files - lock and open the password databases
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*/
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@@ -405,8 +469,16 @@ int main (int argc, char **argv)
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OPENLOG ("chpasswd");
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+#ifdef WITH_AUDIT
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+ audit_help_open ();
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+#endif
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+
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check_perms ();
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+#ifdef WITH_SELINUX
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+ selinux_check_root ();
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+#endif
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+
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#ifdef USE_PAM
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if (!use_pam)
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#endif /* USE_PAM */
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@@ -563,6 +635,11 @@ int main (int argc, char **argv)
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newpw.pw_passwd = cp;
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}
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+#ifdef WITH_AUDIT
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+ audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
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+ "updating-password",
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+ pw->pw_name, (unsigned int) pw->pw_uid, 1);
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+#endif
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/*
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* The updated password file entry is then put back and will
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* be written to the password file later, after all the
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diff -up shadow-4.1.5.1/src/Makefile.am.selinux-perms shadow-4.1.5.1/src/Makefile.am
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--- shadow-4.1.5.1/src/Makefile.am.selinux-perms 2016-05-04 13:44:55.647788082 +0200
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+++ shadow-4.1.5.1/src/Makefile.am 2016-05-27 16:04:49.446582632 +0200
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@@ -79,9 +79,9 @@ endif
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chage_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
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chfn_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
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-chgpasswd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBSELINUX) $(LIBCRYPT)
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+chgpasswd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBSELINUX) $(LIBAUDIT) $(LIBCRYPT)
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chsh_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
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-chpasswd_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT)
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+chpasswd_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBAUDIT) $(LIBCRYPT)
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gpasswd_LDADD = $(LDADD) $(LIBAUDIT) $(LIBSELINUX) $(LIBCRYPT)
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groupadd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
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groupdel_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
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diff -up shadow-4.1.5.1/src/Makefile.in.selinux-perms shadow-4.1.5.1/src/Makefile.in
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--- shadow-4.1.5.1/src/Makefile.in.selinux-perms 2016-05-04 13:44:55.647788082 +0200
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+++ shadow-4.1.5.1/src/Makefile.in 2016-05-27 16:04:49.447582654 +0200
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@@ -437,9 +437,9 @@ AM_CPPFLAGS = -DLOCALEDIR=\"$(datadir)/l
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@USE_PAM_TRUE@LIBCRYPT_NOPAM =
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chage_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
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chfn_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
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-chgpasswd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBSELINUX) $(LIBCRYPT)
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+chgpasswd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBSELINUX) $(LIBAUDIT) $(LIBCRYPT)
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chsh_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT_NOPAM) $(LIBSKEY) $(LIBMD)
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-chpasswd_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBCRYPT)
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+chpasswd_LDADD = $(LDADD) $(LIBPAM) $(LIBSELINUX) $(LIBAUDIT) $(LIBCRYPT)
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gpasswd_LDADD = $(LDADD) $(LIBAUDIT) $(LIBSELINUX) $(LIBCRYPT)
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groupadd_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
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groupdel_LDADD = $(LDADD) $(LIBPAM_SUID) $(LIBAUDIT) $(LIBSELINUX)
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