Security Alert (A18-08-03): Vulnerability in ISC BIND

Description:

A vulnerability was found in "deny-answer-aliases" feature of the Internet Systems Consortium (ISC) BIND software. A remote attacker could send a specially crafted query to trigger an assertion failure.  Only those servers with "deny-answer-aliases" feature explicitly enabled are affected.

Affected Systems:

• BIND 9.7.0 to 9.8.8,
• BIND 9.9.0 to 9.9.13,
• BIND 9.10.0 to 9.10.8,
• BIND 9.11.0 to 9.11.4,
• BIND 9.12.0 to 9.12.2,
• BIND 9.13.0 to 9.13.2,

Impact:

Successful exploitation could lead to a denial of service condition on an affected system.

Recommendation:

ISC has released the following patches to solve the problems:

• BIND 9 version 9.9.13-P1
• BIND 9 version 9.10.8-P1
• BIND 9 version 9.11.4-P1
• BIND 9 version 9.12.2-P1

This link will open in a new windowhttp://www.isc.org/downloads

Users of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.

More Information:

This link will open in a new windowhttps://kb.isc.org/article/AA-01639/0
This link will open in a new windowhttps://www.hkcert.org/my_url/en/alert/18080901
This link will open in a new windowhttps://www.us-cert.gov/ncas/current-activity/2018/08/08/ISC-Releases-Security-Advisory-BIND
This link will open in a new windowhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5740