Red Hat Bugzilla – Bug 883533
CVE-2012-5688 bind: DoS on servers using DNS64
Last modified: 2012-12-29 01:29:01 EST
It was reported that BIND versions 9.8.0 and higher suffered from a flaw in the DNS64 IPv6 transition mechanism. A crafted query could be sent to the server and cause it to crash with a REQUIRE assertion failure.
DNS64 support was added in BIND 9.8.0, so earlier versions are not affected by this flaw. As well, nameservers are only affected if DNS64 support is enabled via the "dns64" configuration statement in named.conf. This is not enabled in the default configuration provided by Red Hat Enterprise Linux 6 or Fedora.
This issue did not affect the versions of bind as shipped with Red Hat Enterprise Linux 4 and 5, nor the versions of bind97 as shipped with Red Hat Enterprise Linux 5, as they did not include support for DNS64.
Created bind tracking bugs for this issue
Affects: fedora-all [bug 883538]
Created attachment 657814 [details]
patch to correct the flaw
Relevant bits from diffing 9.8.4 and 9.8.4-P1.
This issue has been addressed in following products:
Red Hat Enterprise Linux 6
Via RHSA-2012:1549 https://rhn.redhat.com/errata/RHSA-2012-1549.html
bind-9.9.2-5.P1.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
bind-9.9.2-3.P1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
bind-9.8.4-3.P1.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.