Bug 815846 (CVE-2012-2134)

Summary: CVE-2012-2134 bind-dyndb-ldap: Bind DoS (named hang) by processing DNS query for zone served by bind-dyndb-ldap
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: atkac, pspacek, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=important,public=20120424,reported=20120419,source=researcher,cvss2=4.3/AV:N/AC:M/Au:N/C:N/I:N/A:P,rhel-6/bind-dyndb-ldap=affected,fedora-all/bind-dyndb-ldap=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-05-21 14:15:45 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 814495, 815862, 816229    
Bug Blocks: 814624    
Attachments:
Description Flags
Preliminary version of bind-dyndb-ldap upstream patch to correct this issue none

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.

--

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.