CVE-2018-5738

Name
CVE-2018-5738
Description
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Mitigation https://kb.isc.org/docs/aa-01616
Third Party Advisory https://usn.ubuntu.com/3683-1/
Third Party Advisory http://www.securitytracker.com/id/1041115
Third Party Advisory https://security.gentoo.org/glsa/201903-13
CONFIRM https://security.netapp.com/advisory/ntap-20190830-0002/

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:isc:bind:9.12.0:*:*:*:*:*:*:* bind == None == 9.12.0
cpe:2.3:a:isc:bind:9.11.3:s2:*:*:*:*:*:* bind == None == 9.11.3
cpe:2.3:a:isc:bind:9.9.12:*:*:*:*:*:*:* bind == None == 9.9.12
cpe:2.3:a:isc:bind:9.12.1:*:*:*:*:*:*:* bind == None == 9.12.1
cpe:2.3:a:isc:bind:9.13.0:*:*:*:*:*:*:* bind == None == 9.13.0
cpe:2.3:a:isc:bind:9.10.7:*:*:*:*:*:*:* bind == None == 9.10.7

Vulnerable and fixed packages

Source package Branch Version Maintainer Status