Bug 815846 - (CVE-2012-2134) CVE-2012-2134 bind-dyndb-ldap: Bind DoS (named hang) by processing DNS query for zone served by bind-dyndb-ldap
CVE-2012-2134 bind-dyndb-ldap: Bind DoS (named hang) by processing DNS query ...
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=20120424,repo...
: Security
Depends On: 814495 815862 816229
Blocks: 814624
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Reported: 2012-04-24 12:13 EDT by Jan Lieskovsky
Modified: 2016-11-08 11:08 EST (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2012-05-21 14:15:45 EDT
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Preliminary version of bind-dyndb-ldap upstream patch to correct this issue (5.78 KB, patch)
2012-04-24 12:32 EDT, Jan Lieskovsky
no flags Details | Diff

  None (edit)
Description Jan Lieskovsky 2012-04-24 12:13:17 EDT
A denial of service flaw was found in the way the bind-dyndb-ldap, a dynamic LDAP back-end plug-in for BIND providing LDAP database back-end capabilities, performed LDAP connection errors handling / attempted to recover, when an error during a LDAP search happened for a particular DNS query. When the Berkeley Internet Name Domain (BIND) server was patched to support dynamic loading of database back-ends, and the LDAP database back-end was enabled, a remote attacker could use this flaw to cause denial of service (named process hang) via DNS query for zone served by bind-dyndb-ldap.

bind-dyndb-ldap backend upstream commit, which introduced the problem:
[1] http://git.fedorahosted.org/git/?p=bind-dyndb-ldap.git;a=commit;h=a7a47212beb01c5083768bdd4170250e7f7cf188
Comment 1 Jan Lieskovsky 2012-04-24 12:32:06 EDT
Created attachment 579913 [details]
Preliminary version of bind-dyndb-ldap upstream patch to correct this issue
Comment 2 Jan Lieskovsky 2012-04-24 12:35:08 EDT
Public via:
[2] https://www.redhat.com/archives/freeipa-users/2012-April/msg00144.html
Comment 3 Jan Lieskovsky 2012-04-24 12:48:38 EDT
CVE Request:
[3] http://www.openwall.com/lists/oss-security/2012/04/24/14
Comment 4 Jan Lieskovsky 2012-04-24 12:50:04 EDT
This issue affects the version of the bind-dyndb-ldap package, as shipped with Red Hat Enterprise Linux 6.

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This issue affects the versions of the bind-dyndb-ldap package, as shipped with Fedora release of 15 and 16. Please schedule an update.
Comment 5 Jan Lieskovsky 2012-04-24 12:51:59 EDT
Created bind-dyndb-ldap tracking bugs for this issue

Affects: fedora-all [bug 815862]
Comment 8 Jan Lieskovsky 2012-04-26 10:39:18 EDT
Acknowledgements:

Red Hat would like to thank Ronald van Zantvoort for reporting this issue.
Comment 9 Fedora Update System 2012-05-15 19:24:35 EDT
bind-dyndb-ldap-1.1.0-0.11.rc1.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2012-05-15 19:24:52 EDT
bind-dyndb-ldap-1.1.0-0.11.rc1.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 errata-xmlrpc 2012-05-21 13:13:41 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0683 https://rhn.redhat.com/errata/RHSA-2012-0683.html
Comment 12 Fedora Update System 2012-05-26 03:58:13 EDT
bind-dyndb-ldap-1.1.0-0.11.rc1.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

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