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CVE-2018-5740

Published: 9 August 2018

"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.

Mitigation

Disable use of "deny-answer-aliases" feature
Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
bind9
Launchpad, Ubuntu, Debian
bionic
Released (1:9.11.3+dfsg-1ubuntu1.2)
precise
Released (1:9.8.1.dfsg.P1-4ubuntu0.26)
trusty
Released (1:9.9.5.dfsg-3ubuntu0.18)
upstream Needs triage

xenial
Released (1:9.10.3.dfsg.P4-8ubuntu1.11)