diff -up cups-1.4.2/backend/network.c.negative-snmp-string-length cups-1.4.2/backend/network.c
--- cups-1.4.2/backend/network.c.negative-snmp-string-length	2009-08-31 19:45:43.000000000 +0100
+++ cups-1.4.2/backend/network.c	2009-12-08 11:14:45.010363459 +0000
@@ -170,9 +170,13 @@ backendNetworkSideCB(
 
 	        case CUPS_ASN1_BIT_STRING :
 	        case CUPS_ASN1_OCTET_STRING :
-		    i = (int)(sizeof(data) - (dataptr - data));
-		    if (packet.object_value.string.num_bytes < i)
+		    if (packet.object_value.string.num_bytes < 0)
+		      i = 0;
+		    else if (packet.object_value.string.num_bytes < 
+			     (sizeof(data) - (dataptr - data)))
 		      i = packet.object_value.string.num_bytes;
+		    else
+		      i = (int)(sizeof(data) - (dataptr - data));
 
 		    memcpy(dataptr, packet.object_value.string.bytes, i);
 
diff -up cups-1.4.2/backend/snmp-supplies.c.negative-snmp-string-length cups-1.4.2/backend/snmp-supplies.c
--- cups-1.4.2/backend/snmp-supplies.c.negative-snmp-string-length	2009-08-31 17:34:06.000000000 +0100
+++ cups-1.4.2/backend/snmp-supplies.c	2009-12-08 11:15:05.505362685 +0000
@@ -232,6 +232,8 @@ backendSNMPSupplies(
     if (packet.object_value.string.num_bytes == 2)
       new_state = (packet.object_value.string.bytes[0] << 8) |
 		  packet.object_value.string.bytes[1];
+    else if (packet.object_value.string.num_bytes == 1)
+      new_state = (packet.object_value.string.bytes[0] << 8);
     else
       new_state = 0;