Bug 1281326 (CVE-2015-5330) - CVE-2015-5330 samba, libldb: remote memory read in the Samba LDAP server
Summary: CVE-2015-5330 samba, libldb: remote memory read in the Samba LDAP server
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-5330
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1290712 1290713 1290714 1290715 1290727 1291376 1292070
Blocks: 1281327
TreeView+ depends on / blocked
 
Reported: 2015-11-12 10:11 UTC by Adam Mariš
Modified: 2023-05-12 18:37 UTC (History)
17 users (show)

Fixed In Version: libldb 1.1.24, samba 4.1.22, samba 4.2.7, samba 4.3.3
Doc Type: Bug Fix
Doc Text:
A memory-read flaw was found in the way the libldb library processed LDB DN records with a null byte. An authenticated, remote attacker could use this flaw to read heap-memory pages from the server.
Clone Of:
Environment:
Last Closed: 2016-01-08 12:18:53 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:0006 0 normal SHIPPED_LIVE Moderate: samba security update 2016-01-08 06:39:15 UTC
Red Hat Product Errata RHSA-2016:0009 0 normal SHIPPED_LIVE Moderate: libldb security update 2016-01-08 06:12:46 UTC
Red Hat Product Errata RHSA-2016:0010 0 normal SHIPPED_LIVE Moderate: samba4 security update 2016-01-08 03:43:17 UTC
Red Hat Product Errata RHSA-2016:0014 0 normal SHIPPED_LIVE Moderate: libldb security update 2016-01-08 14:13:42 UTC
Red Hat Product Errata RHSA-2016:0015 0 normal SHIPPED_LIVE Moderate: samba security update 2016-01-08 15:18:26 UTC
Red Hat Product Errata RHSA-2016:0016 0 normal SHIPPED_LIVE Moderate: samba security update 2016-01-08 15:17:52 UTC

Description Adam Mariš 2015-11-12 10:11:10 UTC 
It was reported that when adding an LDB DN to the database, that if a \00 (null byte) is used, remote memory can be read due to a combination of talloc_strdup() and a length assignment.

Upstream bug:

https://bugzilla.samba.org/show_bug.cgi?id=11599
Comment 3 Huzaifa S. Sidhpurwala 2015-12-10 06:28:17 UTC 
Acknowledgements:

Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Douglas Bagnall as the original reporter.
Comment 7 Siddharth Sharma 2015-12-16 12:10:06 UTC 
Created libldb tracking bugs for this issue:

Affects: fedora-all [bug 1292070]
Comment 8 Huzaifa S. Sidhpurwala 2015-12-17 04:10:11 UTC 
External References:

https://www.samba.org/samba/security/CVE-2015-5330.html
Comment 9 Tomas Hoger 2015-12-17 14:52:50 UTC 
Upstream commits tagged with CVE-2015-5330.

There are multiple commits for libldb using this CVE id:

https://git.samba.org/?p=samba.git;a=commitdiff;h=7f51ec8c4ed9ba1f53d722e44fb6fb3cde933b72
https://git.samba.org/?p=samba.git;a=commitdiff;h=0454b95657846fcecf0f51b6f1194faac02518bd
https://git.samba.org/?p=samba.git;a=commitdiff;h=f36cb71c330a52106e36028b3029d952257baf15

However, there are additional commits tagged with this CVE affecting samba code rather than libldb:

https://git.samba.org/?p=samba.git;a=commitdiff;h=ba5dbda6d0174a59d221c45cca52ecd232820d48
https://git.samba.org/?p=samba.git;a=commitdiff;h=a118d4220ed85749c07fb43c1229d9e2fecbea6b
https://git.samba.org/?p=samba.git;a=commitdiff;h=538d305de91e34a2938f5f219f18bf0e1918763f
Comment 10 Tomas Hoger 2015-12-17 15:18:30 UTC 
The non-ldb samba fixes were applied in upstream versions 4.1.22, 4.2.7, and 4.3.3.
Comment 11 errata-xmlrpc 2016-01-08 01:13:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 6

Via RHSA-2016:0009 https://rhn.redhat.com/errata/RHSA-2016-0009.html
Comment 12 errata-xmlrpc 2016-01-08 01:40:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0006 https://rhn.redhat.com/errata/RHSA-2016-0006.html
Comment 13 errata-xmlrpc 2016-01-08 09:13:52 UTC 
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.1 for RHEL 6
  Red Hat Gluster Storage 3.1 for RHEL 7

Via RHSA-2016:0014 https://rhn.redhat.com/errata/RHSA-2016-0014.html
Comment 14 errata-xmlrpc 2016-01-08 10:18:55 UTC 
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.1 for RHEL 7

Via RHSA-2016:0016 https://rhn.redhat.com/errata/RHSA-2016-0016.html
Comment 15 errata-xmlrpc 2016-01-08 10:19:33 UTC 
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.1 for RHEL 6

Via RHSA-2016:0015 https://rhn.redhat.com/errata/RHSA-2016-0015.html
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