A security issue was identified and fixed in ISC BIND: libdns in ISC BIND 9.7.x and 9.8.x before 9.8.4-P2, 9.8.5 before 9.8.5b2, 9.9.x before 9.9.2-P2, and 9.9.3 before 9.9.3b2 on UNIX platforms allows remote attackers to cause a denial of service via a crafted regular expression, as demonstrated by a memory-exhaustion attack against a machine running a named process . The updated packages have been patched to correct this issue.