Bug 1290287 (CVE-2015-3223)

Summary:	CVE-2015-3223 libldb: Remote DoS in Samba (AD) LDAP server
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aavati, asn, carnil, gdeschner, jarrpa, jrusnack, nlevinki, rfortier, sbose, security-response-team, sgirijan, sisharma, slong, smohan, ssaha, vbellur
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libldb 1.1.24	Doc Type:	Bug Fix
Doc Text:	A denial of service flaw was found in the ldb_wildcard_compare() function of libldb. A remote attacker could send a specially crafted packet that, when processed by an application using libldb (for example the AD LDAP server in Samba), would cause that application to consume an excessive amount of memory and crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-08 12:18:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1290708, 1290709, 1290710, 1290712, 1290713, 1290714, 1290715, 1291376, 1292069
Bug Blocks:	1281327

Description Huzaifa S. Sidhpurwala 2015-12-10 04:52:49 UTC

As per samba upstream advisory:


All versions of Samba from 4.0.0 to 4.3.2 inclusive are vulnerable to a denial of service attack in the samba daemon LDAP server.

A malicious client can send packets that cause the LDAP server in the samba daemon process to become unresponsive, preventing the server from servicing any other requests.

This flaw is not exploitable beyond causing the code to loop expending CPU resources.

Comment 1 Huzaifa S. Sidhpurwala 2015-12-10 06:30:58 UTC

Acknowledgements:

Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Thilo Uttendorfer as the original reporter.

Comment 6 Siddharth Sharma 2015-12-16 12:09:04 UTC

Created samba tracking bugs for this issue:

Affects: fedora-all [bug 1292069]

Comment 7 Huzaifa S. Sidhpurwala 2015-12-17 04:11:29 UTC

External References:

https://www.samba.org/samba/security/CVE-2015-3223.html

Comment 8 Tomas Hoger 2015-12-17 14:54:30 UTC

Upstream commits tagged with CVE-2015-3223.  Both are changes in libldb rather than samba.

https://git.samba.org/?p=samba.git;a=commitdiff;h=ec504dbf69636a554add1f3d5703dd6c3ad450b8
https://git.samba.org/?p=samba.git;a=commitdiff;h=aa6c27148b9d3f8c1e4fdd5dd46bfecbbd0ca465

Comment 14 errata-xmlrpc 2016-01-08 01:13:14 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 15 errata-xmlrpc 2016-01-08 09:14:01 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