cups/cups-substitute-bad-attrs.patch
2022-07-08 02:13:04 +00:00

142 lines
5.4 KiB
Diff

diff -up cups-2.2.7/scheduler/ipp.c.substitute-bad-attrs cups-2.2.7/scheduler/ipp.c
--- cups-2.2.7/scheduler/ipp.c.substitute-bad-attrs 2018-04-03 15:55:45.974344993 +0200
+++ cups-2.2.7/scheduler/ipp.c 2018-04-03 16:15:06.723859881 +0200
@@ -164,6 +164,7 @@ cupsdProcessIPPRequest(
ipp_attribute_t *uri = NULL; /* Printer or job URI attribute */
ipp_attribute_t *username; /* requesting-user-name attr */
int sub_id; /* Subscription ID */
+ int valid = 1; /* Valid request? */
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdProcessIPPRequest(%p[%d]): operation_id=%04x(%s)", con, con->number, con->request->request.op.operation_id, ippOpString(con->request->request.op.operation_id));
@@ -423,20 +424,55 @@ cupsdProcessIPPRequest(
else
{
/*
- * OK, all the checks pass so far; make sure requesting-user-name is
- * not "root" from a remote host...
+ * OK, all the checks pass so far; validate "requesting-user-name"
+ * attribute value...
*/
- if ((username = ippFindAttribute(con->request, "requesting-user-name",
- IPP_TAG_NAME)) != NULL)
- {
- /*
- * Check for root user...
- */
-
- if (!strcmp(username->values[0].string.text, "root") &&
- _cups_strcasecmp(con->http->hostname, "localhost") &&
- strcmp(con->username, "root"))
+ if ((username = ippFindAttribute(con->request, "requesting-user-name", IPP_TAG_ZERO)) != NULL)
+ {
+ /*
+ * Validate "requesting-user-name"...
+ */
+
+ if (username->group_tag != IPP_TAG_OPERATION && StrictConformance)
+ {
+ cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL, "%04X %s \"requesting-user-name\" attribute in wrong group.", IPP_STATUS_ERROR_BAD_REQUEST, con->http->hostname);
+ send_ipp_status(con, IPP_STATUS_ERROR_BAD_REQUEST, _("\"requesting-user-name\" attribute in wrong group."));
+ valid = 0;
+ }
+ else if (username->value_tag != IPP_TAG_NAME && username->value_tag != IPP_TAG_NAMELANG)
+ {
+ cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL, "%04X %s \"requesting-user-name\" attribute with wrong syntax.", IPP_STATUS_ERROR_ATTRIBUTES_OR_VALUES, con->http->hostname);
+ send_ipp_status(con, IPP_STATUS_ERROR_ATTRIBUTES_OR_VALUES, _("\"requesting-user-name\" attribute with wrong syntax."));
+ if ((attr = ippCopyAttribute(con->response, username, 0)) != NULL)
+ attr->group_tag = IPP_TAG_UNSUPPORTED_GROUP;
+ valid = 0;
+ }
+ else if (!ippValidateAttribute(username))
+ {
+ cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL, "%04X %s \"requesting-user-name\" attribute with bad value.", IPP_STATUS_ERROR_ATTRIBUTES_OR_VALUES, con->http->hostname);
+
+ if (StrictConformance)
+ {
+ /*
+ * Throw an error...
+ */
+
+ send_ipp_status(con, IPP_STATUS_ERROR_ATTRIBUTES_OR_VALUES, _("\"requesting-user-name\" attribute with wrong syntax."));
+ if ((attr = ippCopyAttribute(con->response, username, 0)) != NULL)
+ attr->group_tag = IPP_TAG_UNSUPPORTED_GROUP;
+ valid = 0;
+ }
+ else
+ {
+ /*
+ * Map bad "requesting-user-name" to 'anonymous'...
+ */
+
+ ippSetString(con->request, &username, 0, "anonymous");
+ }
+ }
+ else if (!strcmp(username->values[0].string.text, "root") && _cups_strcasecmp(con->http->hostname, "localhost") && strcmp(con->username, "root"))
{
/*
* Remote unauthenticated user masquerading as local root...
@@ -452,6 +488,8 @@ cupsdProcessIPPRequest(
else
sub_id = 0;
+ if (valid)
+ {
/*
* Then try processing the operation...
*/
@@ -655,6 +693,7 @@ cupsdProcessIPPRequest(
ippOpString(
con->request->request.op.operation_id));
break;
+ }
}
}
}
@@ -1615,27 +1654,34 @@ add_job(cupsd_client_t *con, /* I - Cl
_("Bad job-name value: Wrong type or count."));
if ((attr = ippCopyAttribute(con->response, attr, 0)) != NULL)
attr->group_tag = IPP_TAG_UNSUPPORTED_GROUP;
- return (NULL);
+
+ if (StrictConformance)
+ return (NULL);
+
+ /* Don't use invalid attribute */
+ ippDeleteAttribute(con->request, attr);
+
+ ippAddString(con->request, IPP_TAG_JOB, IPP_TAG_NAME, "job-name", NULL, "Untitled");
}
else if (!ippValidateAttribute(attr))
{
send_ipp_status(con, IPP_ATTRIBUTES, _("Bad job-name value: %s"),
cupsLastErrorString());
+
if ((attr = ippCopyAttribute(con->response, attr, 0)) != NULL)
attr->group_tag = IPP_TAG_UNSUPPORTED_GROUP;
- return (NULL);
- }
- attr = ippFindAttribute(con->request, "requesting-user-name", IPP_TAG_NAME);
+ if (StrictConformance)
+ return (NULL);
- if (attr && !ippValidateAttribute(attr))
- {
- send_ipp_status(con, IPP_ATTRIBUTES, _("Bad requesting-user-name value: %s"), cupsLastErrorString());
- if ((attr = ippCopyAttribute(con->response, attr, 0)) != NULL)
- attr->group_tag = IPP_TAG_UNSUPPORTED_GROUP;
- return (NULL);
+ /* Don't use invalid attribute */
+ ippDeleteAttribute(con->request, attr);
+
+ ippAddString(con->request, IPP_TAG_JOB, IPP_TAG_NAME, "job-name", NULL, "Untitled");
}
+ attr = ippFindAttribute(con->request, "requesting-user-name", IPP_TAG_NAME);
+
#ifdef WITH_LSPP
if (is_lspp_config())
{