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jpp |
1.1 |
diff -up sudo-1.8.6p3/plugins/sudoers/sssd.c.netgrfilterfix sudo-1.8.6p3/plugins/sudoers/sssd.c |
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--- sudo-1.8.6p3/plugins/sudoers/sssd.c.netgrfilterfix 2014-07-30 13:29:47.713823996 +0200 |
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+++ sudo-1.8.6p3/plugins/sudoers/sssd.c 2014-07-30 13:30:08.917436088 +0200 |
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@@ -614,16 +615,13 @@ sudo_sss_check_host(struct sudo_sss_hand |
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} |
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/* |
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- * Look for netgroup specifcations in the sudoUser attribute and |
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- * if found, filter according to netgroup membership. |
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- * returns: |
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- * true -> netgroup spec found && negroup member |
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- * false -> netgroup spec found && not a meber of netgroup |
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- * true -> netgroup spec not found (filtered by SSSD already, netgroups are an exception) |
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+ * SSSD doesn't handle netgroups, we have to ensure they are correctly filtered |
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+ * in sudo. The rules may contain mixed sudoUser specification so we have to check |
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+ * not only for netgroup membership but also for user and group matches. |
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*/ |
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-bool sudo_sss_filter_user_netgroup(struct sudo_sss_handle *handle, struct sss_sudo_rule *rule) |
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+bool sudo_sss_filter_sudoUser(struct sudo_sss_handle *handle, struct sss_sudo_rule *rule) |
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{ |
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- bool ret = false, netgroup_spec_found = false; |
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+ bool ret = false; |
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char **val_array, *val; |
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int i; |
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debug_decl(sudo_sss_check_user_netgroup, SUDO_DEBUG_SSSD); |
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@@ -641,21 +639,48 @@ bool sudo_sss_filter_user_netgroup(struc |
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sudo_debug_printf(SUDO_DEBUG_INFO, "handle->fn_get_values(sudoUser): != 0"); |
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debug_return_bool(ret); |
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} |
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- |
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+ /* |
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+ * Scan sudoUser values and look for netgroup specs. |
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+ * Netgroup-only rule specification should be filtered |
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+ * out if the user isn't member of any specified netgroup. |
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+ */ |
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for (i = 0; val_array[i] != NULL && !ret; ++i) { |
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val = val_array[i]; |
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- if (*val == '+') { |
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- netgroup_spec_found = true; |
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- } |
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sudo_debug_printf(SUDO_DEBUG_DEBUG, "val[%d]=%s", i, val); |
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- if (strcmp(val, "ALL") == 0 || netgr_matches(val, NULL, NULL, user_name)) { |
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- ret = true; |
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- sudo_debug_printf(SUDO_DEBUG_DIAG, |
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- "sssd/ldap sudoUser '%s' ... MATCH! (%s)", val, user_name); |
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+ if (*val == '+') { |
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+ /* Netgroup spec found, check netgroup membership */ |
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+ if (netgr_matches(val, NULL, NULL, handle->pw->pw_name)) { |
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+ ret = true; |
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+ sudo_debug_printf(SUDO_DEBUG_DIAG, |
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+ "sssd/ldap sudoUser '%s' ... MATCH! (%s)", val, handle->pw->pw_name); |
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+ } |
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+ } else { |
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+ /* |
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+ * Non-netgroup sudoUser value |
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+ */ |
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+ if (strcmp(val, "ALL") == 0) { |
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+ ret = true; |
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+ } else { |
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+ const char *match_val = (*val == '!' ? val + 1 : val); |
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+ const bool negated = (*val == '!' ? true : false); |
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+ const bool group_spec = (*match_val == '%' ? true : false); |
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+ |
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+ if (group_spec) { |
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+ if (usergr_matches(match_val, |
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+ handle->pw->pw_name, handle->pw)) { |
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+ ret = !negated; |
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+ } |
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+ } else { |
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+ if (userpw_matches(match_val, |
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+ handle->pw->pw_name, handle->pw)) { |
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+ ret = !negated; |
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+ } |
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+ } |
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+ } |
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} |
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} |
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handle->fn_free_values(val_array); |
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- debug_return_bool(netgroup_spec_found ? ret : true); |
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+ debug_return_bool(ret); |
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} |
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static int |
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@@ -666,7 +691,7 @@ sudo_sss_result_filterp(struct sudo_sss_ |
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debug_decl(sudo_sss_result_filterp, SUDO_DEBUG_SSSD); |
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if (sudo_sss_check_host(handle, rule) && |
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- sudo_sss_filter_user_netgroup(handle, rule)) |
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+ sudo_sss_filter_sudoUser(handle, rule)) |
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debug_return_int(1); |
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else |
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debug_return_int(0); |
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