Unspecified vulnerability in the (1) web cache or (2) web proxy in Fujitsu NetShelter/FW allows remote attackers to cause a denial of service (device unresponsiveness) via certain DNS packets, as demonstrated by the OUSPG PROTOS DNS test suite. All Fujitsu NetShelter/FW models E12Lxx and E11Lxx are affected except E11L27 and E12L31. The listing of affected models is broad, but the following list is a list of exceptions: