Bug 1538771 (CVE-2018-1050)

Summary:	CVE-2018-1050 samba: NULL pointer dereference in printer server process
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	abokovoy, anoopcs, apmukher, asn, dominik.mierzejewski, gdeschner, jarrpa, kbost, lmohanty, madam, rhs-smb, sbose, security-response-team, sisharma, ssaha, ssorce, vbellur, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	samba 4.7.6, samba 4.6.14, samba 4.5.16	Doc Type:	If docs needed, set a value
Doc Text:	A null pointer dereference flaw was found in Samba RPC external printer service. An attacker could use this flaw to cause the printer spooler service to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:38:17 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:	1551924, 1552004, 1552005, 1553018, 1553031, 1554753, 1554754, 1564433
Bug Blocks:	1538774

Description Pedro Sampaio 2018-01-25 19:37:41 UTC

A flaw was found in Samba. A null pointer indirection in the printer server process may lead to denial of service.

Upstream bug:

https://bugzilla.samba.org/show_bug.cgi?id=11343

Comment 1 Pedro Sampaio 2018-01-25 19:37:47 UTC

Acknowledgments:

Name: the Samba project

Comment 2 Huzaifa S. Sidhpurwala 2018-02-16 07:02:57 UTC

Mitigation:

Ensure the paramter:
rpc_server:spoolss = external
is not set in the [global] section of your smb.conf.

Comment 6 Huzaifa S. Sidhpurwala 2018-03-13 10:13:22 UTC

External References:

https://www.samba.org/samba/security/CVE-2018-1050.html

Comment 7 Huzaifa S. Sidhpurwala 2018-03-13 10:14:27 UTC

Created samba tracking bugs for this issue:

Affects: fedora-all [bug 1554754]

Comment 10 errata-xmlrpc 2018-06-19 04:49:43 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1860 https://access.redhat.com/errata/RHSA-2018:1860

Comment 11 errata-xmlrpc 2018-06-19 04:50:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1883 https://access.redhat.com/errata/RHSA-2018:1883

Comment 12 errata-xmlrpc 2018-09-04 06:29:03 UTC

This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.4 for RHEL 7

Via RHSA-2018:2613 https://access.redhat.com/errata/RHSA-2018:2613

Comment 13 errata-xmlrpc 2018-09-04 06:31:41 UTC

This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.4 for RHEL 6

Via RHSA-2018:2612 https://access.redhat.com/errata/RHSA-2018:2612

Comment 14 errata-xmlrpc 2018-10-30 07:25:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3056 https://access.redhat.com/errata/RHSA-2018:3056