diff -up cups-1.7b1/scheduler/printers.c.stringpool-setprinterattr cups-1.7b1/scheduler/printers.c
--- cups-1.7b1/scheduler/printers.c.stringpool-setprinterattr	2013-06-13 12:18:04.678129506 +0100
+++ cups-1.7b1/scheduler/printers.c	2013-06-13 12:18:04.721129670 +0100
@@ -1881,6 +1881,7 @@ cupsdSetPrinterAttr(
   ipp_attribute_t	*attr;		/* Attribute */
   int			i,		/* Looping var */
 			count;		/* Number of values */
+  char			*value_dup;	/* Copy of attribute value string */
   char			*ptr,		/* Pointer into value */
 			*start,		/* Start of value */
 			quote;		/* Quote character */
@@ -1949,16 +1950,24 @@ cupsdSetPrinterAttr(
       return;
     }
 
-    for (i = 0; i < count; i ++)
+    if ((value_dup = strdup(value)) == NULL)
     {
-      if ((ptr = strchr(value, ',')) != NULL)
+      cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to copy attribute value.");
+      return;
+    }
+
+    for (i = 0, start = value_dup; i < count; i ++)
+    {
+      if ((ptr = strchr(start, ',')) != NULL)
         *ptr++ = '\0';
 
-      attr->values[i].integer = strtol(value, NULL, 10);
+      attr->values[i].integer = strtol(start, NULL, 10);
 
       if (ptr)
-        value = ptr;
+        start = ptr;
     }
+
+    free(value_dup);
   }
   else
   {
@@ -1999,7 +2008,13 @@ cupsdSetPrinterAttr(
       return;
     }
 
-    for (i = 0, quote = '\0', ptr = value; i < count; i ++)
+    if ((value_dup = strdup(value)) == NULL)
+    {
+      cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to copy attribute value.");
+      return;
+    }
+
+    for (i = 0, quote = '\0', ptr = value_dup; i < count; i ++)
     {
       for (start = ptr; *ptr; ptr ++)
       {
@@ -2027,6 +2042,8 @@ cupsdSetPrinterAttr(
 
       attr->values[i].string.text = _cupsStrAlloc(start);
     }
+
+    free(value_dup);
   }
 }