Bug 883533 - (CVE-2012-5688) CVE-2012-5688 bind: DoS on servers using DNS64
CVE-2012-5688 bind: DoS on servers using DNS64
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20121204,repo...
: Security
Depends On: 883538 883539 883540
Blocks: 883535
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Reported: 2012-12-04 15:13 EST by Vincent Danen
Modified: 2012-12-29 01:29 EST (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2012-12-17 14:50:44 EST
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Attachments (Terms of Use)
patch to correct the flaw (634 bytes, patch)
2012-12-04 18:10 EST, Vincent Danen
no flags Details | Diff

  None (edit)
Description Vincent Danen 2012-12-04 15:13:47 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.


External References:

https://kb.isc.org/article/AA-00828
Comment 1 Vincent Danen 2012-12-04 15:16:56 EST
Statement:

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.
Comment 3 Vincent Danen 2012-12-04 15:18:19 EST
Created bind tracking bugs for this issue

Affects: fedora-all [bug 883538]
Comment 4 Vincent Danen 2012-12-04 18:10:20 EST
Created attachment 657814 [details]
patch to correct the flaw

Relevant bits from diffing 9.8.4 and 9.8.4-P1.
Comment 5 errata-xmlrpc 2012-12-06 15:34:39 EST
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
Comment 6 Fedora Update System 2012-12-10 02:10:26 EST
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.
Comment 7 Fedora Update System 2012-12-13 00:50:11 EST
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.
Comment 8 Fedora Update System 2012-12-29 01:29:01 EST
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.

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