CVE-2018-5738

Change #4777 (introduced in October 2017) introduced an unforeseen issue in releases which were issued after that date, affecting which clients are permitted to make recursive queries to a BIND nameserver. The intended (and documented) behavior is that if an operator has not specified a value for the "allow-recursion" setting, it SHOULD default to one of the following: none, if "recursion no;" is set in named.conf; a value inherited from the "allow-query-cache" or "allow-query" settings IF "recursion yes;" (the default for that setting) AND match lists are explicitly set for "allow-query-cache" or "allow-query" (see the BIND9 Administrative Reference Manual section 6.2 for more details); or the intended default of "allow-recursion {localhost; localnets;};" if "recursion yes;" is in effect and no values are explicitly set for "allow-query-cache" or "allow-query". However, because of the regression introduced by change #4777, it is possible when "recursion yes;" is in effect and no match list values are provided for "allow-query-cache" or "allow-query" for the setting of "allow-recursion" to inherit a setting of all hosts from the "allow-query" setting default, improperly permitting recursion to all clients. Affects BIND 9.9.12, 9.10.7, 9.11.3, 9.12.0->9.12.1-P2, the development release 9.13.0, and also releases 9.9.12-S1, 9.10.7-S1, 9.11.3-S1, and 9.11.3-S2 from BIND 9 Supported Preview Edition.
Configurations

Configuration 1

cpe:2.3:a:isc:bind:9.12.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.0:b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.0:b2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.0:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.3:s2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.3:s1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.10.7:s1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.12:s1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.10.7:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.3:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.0:a1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.0:rc3:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.1:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.1:p2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.13.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.12:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

Information

Published : 2019-01-16 08:29

Updated : 2019-08-30 05:15


NVD link : CVE-2018-5738

Mitre link : CVE-2018-5738

Products Affected
No products.
CWE