Bug 1477184 (CVE-2017-7546)

Summary:	CVE-2017-7546 postgresql: Empty password accepted in some authentication methods
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bkearney, cpelland, dajohnso, databases-maint, devrim, gblomqui, ggainey, gmccullo, gtanzill, hhorak, hhudgeon, jfrey, jhardy, jmlich83, jorton, jprause, jstanek, kbost, meissner, mike, noor.mulla, obarenbo, pkubat, praiskup, roliveri, security-response-team, simaishi, tgl, thomas, tlestach
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	postgresql 9.2.22, postgresql 9.3.18, postgresql 9.4.13, postgresql 9.5.8, postgresql 9.6.4	Doc Type:	If docs needed, set a value
Doc Text:	It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq's refusal to send an empty password. A remote attacker could potentially use this flaw to gain access to database accounts with empty passwords.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:19:38 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:	1477694, 1477695, 1480282, 1480283, 1480284, 1484644, 1484645, 1484646, 1484647, 1484648, 1484649, 1484677, 1484678
Bug Blocks:	1477189

Description Adam Mariš 2017-08-01 12:24:01 UTC

Several authentication methods, including the widely-used "md5" method, permit empty passwords. On the client side, libpq will not send an empty password. This may have given a false impression that an empty password was equivalent to disabling the account with respect to authentication methods requiring a password. On the contrary, an attacker could easily authenticate as the user.

Supported vulnerable versions: 9.2 - 9.6

Upstream patch:

https://github.com/postgres/postgres/commit/d5d46d99ba47f

Comment 1 Adam Mariš 2017-08-01 12:24:10 UTC

Acknowledgments:

Name: the PostgreSQL project
Upstream: Ben de Graaff, Jelte Fennema, Jeroen van der Ham

Comment 4 Adam Mariš 2017-08-10 15:11:18 UTC

External References:

https://www.postgresql.org/about/news/1772/

Comment 5 Adam Mariš 2017-08-10 15:13:08 UTC

Created mingw-postgresql tracking bugs for this issue:

Affects: epel-7 [bug 1480282]
Affects: fedora-all [bug 1480283]


Created postgresql tracking bugs for this issue:

Affects: fedora-all [bug 1480284]

Comment 8 errata-xmlrpc 2017-09-12 08:01:20 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2017:2677 https://access.redhat.com/errata/RHSA-2017:2677

Comment 9 errata-xmlrpc 2017-09-12 10:03:36 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2017:2678 https://access.redhat.com/errata/RHSA-2017:2678

Comment 10 errata-xmlrpc 2017-09-14 07:13:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2728 https://access.redhat.com/errata/RHSA-2017:2728

Comment 11 errata-xmlrpc 2017-10-05 08:19:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:2860 https://access.redhat.com/errata/RHSA-2017:2860

Comment 12 Kurt Seifried 2017-12-18 22:07:24 UTC

Statement:

Red Hat Satellite 5 are is in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.