diff -up cups-1.5.0/backend/snmp.c.snmp-bad-uri cups-1.5.0/backend/snmp.c
--- cups-1.5.0/backend/snmp.c.snmp-bad-uri 2012-01-17 11:51:00.786457690 +0000
+++ cups-1.5.0/backend/snmp.c 2012-01-17 11:51:57.123384361 +0000
@@ -1120,7 +1120,8 @@ read_snmp_response(int fd) /* I - SNMP
case DEVICE_URI :
if (device && packet.object_type == CUPS_ASN1_OCTET_STRING &&
- !device->uri && packet.object_value.string.num_bytes > 0)
+ !device->uri && packet.object_value.string.num_bytes > 3 &&
+ strlen ((char *)packet.object_value.string.bytes) > 3)
{
/*
* Update an existing cache entry...