#! /bin/sh /usr/share/dpatch/dpatch-run
# Description: fix cookie disclosure via Bad Request errors
# Origin: upstream, http://svn.apache.org/viewvc?view=revision&revision=1235454

@DPATCH@
diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch' '--exclude=.hg' '--exclude=_darcs' '--exclude=.bzr' apache2-2.2.17~/server/protocol.c apache2-2.2.17/server/protocol.c
--- apache2-2.2.17~/server/protocol.c	2012-02-14 10:02:14.000000000 -0500
+++ apache2-2.2.17/server/protocol.c	2012-02-14 10:02:19.288419802 -0500
@@ -670,6 +670,16 @@
     return 1;
 }
 
+/* get the length of the field name for logging, but no more than 80 bytes */
+#define LOG_NAME_MAX_LEN 80
+static int field_name_len(const char *field)
+{
+    const char *end = ap_strchr_c(field, ':');
+    if (end == NULL || end - field > LOG_NAME_MAX_LEN)
+        return LOG_NAME_MAX_LEN;
+    return end - field;
+}
+
 AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r, apr_bucket_brigade *bb)
 {
     char *last_field = NULL;
@@ -709,12 +719,15 @@
                 /* insure ap_escape_html will terminate correctly */
                 field[len - 1] = '\0';
                 apr_table_setn(r->notes, "error-notes",
-                               apr_pstrcat(r->pool,
+                               apr_psprintf(r->pool,
                                            "Size of a request header field "
                                            "exceeds server limit.<br />\n"
-                                           "<pre>\n",
-                                           ap_escape_html(r->pool, field),
-                                           "</pre>\n", NULL));
+                                           "<pre>\n%.*s\n</pre>/n",
+                                           field_name_len(field), 
+                                           ap_escape_html(r->pool, field)));
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, 
+                              "Request header exceeds LimitRequestFieldSize: "
+                              "%.*s", field_name_len(field), field);
             }
             return;
         }
@@ -735,13 +748,17 @@
                      * overflow (last_field) as the field with the problem
                      */
                     apr_table_setn(r->notes, "error-notes",
-                                   apr_pstrcat(r->pool,
+                                   apr_psprintf(r->pool,
                                                "Size of a request header field "
                                                "after folding "
                                                "exceeds server limit.<br />\n"
-                                               "<pre>\n",
-                                               ap_escape_html(r->pool, last_field),
-                                               "</pre>\n", NULL));
+                                               "<pre>\n%.*s\n</pre>\n",
+                                               field_name_len(last_field),
+                                               ap_escape_html(r->pool, last_field)));
+                    ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                                  "Request header exceeds LimitRequestFieldSize "
+                                  "after folding: %.*s",
+                                  field_name_len(last_field), last_field);
                     return;
                 }
 
@@ -773,13 +790,18 @@
                 if (!(value = strchr(last_field, ':'))) { /* Find ':' or    */
                     r->status = HTTP_BAD_REQUEST;      /* abort bad request */
                     apr_table_setn(r->notes, "error-notes",
-                                   apr_pstrcat(r->pool,
+                                   apr_psprintf(r->pool,
                                                "Request header field is "
                                                "missing ':' separator.<br />\n"
-                                               "<pre>\n",
+                                               "<pre>\n%.*s</pre>\n",
+                                               (int)LOG_NAME_MAX_LEN,
                                                ap_escape_html(r->pool,
-                                                              last_field),
-                                               "</pre>\n", NULL));
+                                                              last_field)));
+                    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                                  "Request header field is missing ':' "
+                                  "separator: %.*s", (int)LOG_NAME_MAX_LEN,
+                                  last_field);
+
                     return;
                 }
 
