high
7.5
CWE
617
Advisory Published
CVE Published
Updated

CVE-2018-5740: A flaw in the "deny-answer-aliases" feature can cause an assertion failure in named

First published: Wed Aug 08 2018(Updated: )

"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.

Credit: security-officer@isc.org security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
redhat/bind<9.9.13
9.9.13
redhat/bind<9.10.8
9.10.8
redhat/bind<9.11.4
9.11.4
redhat/bind<9.12.2
9.12.2
debian/bind9
1:9.16.50-1~deb11u2
1:9.16.50-1~deb11u1
1:9.18.28-1~deb12u2
1:9.20.2-1
ISC BIND>=9.7.0<9.8.8
ISC BIND>=9.9.0<9.9.13
ISC BIND>=9.10.0<9.10.8
ISC BIND>=9.11.0<9.11.4
ISC BIND>=9.12.0<9.12.2
ISC BIND>=9.13.0<9.13.2
redhat enterprise Linux desktop=6.0
redhat enterprise Linux desktop=7.0
redhat enterprise Linux server=6.0
redhat enterprise Linux server=7.0
redhat enterprise Linux server aus=7.6
redhat enterprise Linux server eus=7.5
redhat enterprise Linux server eus=7.6
redhat enterprise Linux workstation=6.0
redhat enterprise Linux workstation=7.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
NetApp Data ONTAP Edge
Ubuntu Linux=12.04
Ubuntu Linux=14.04
Ubuntu Linux=16.04
Ubuntu Linux=18.04
HPE HP-UX
openSUSE=15.0
openSUSE=15.1
openSUSE=42.3

Remedy

Disable use of "deny-answer-aliases" feature

Remedy

Most operators will not need to make any changes unless they are using the "deny-answer-aliases" feature (which is described in the BIND 9 Adminstrator Reference Manual section 6.2.) "deny-answer-aliases" is off by default; only configurations which explicitly enable it can be affected by this defect. If you are using "deny-answer-aliases", upgrade to the patched release most closely related to your current version of BIND. 9.9.13-P1 9.10.8-P1 9.11.4-P1 9.12.2-P1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. 9.11.3-S3

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