Bug 1551082 (CVE-2018-5730)

Summary:	CVE-2018-5730 krb5: DN container check bypass by supplying special crafted data
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
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, bmaxwell, cdewolf, chazlett, csutherl, darran.lofthouse, dimitris, dosoudil, dpal, fgavrilo, gzaronik, jawilson, jclere, jondruse, jplans, jrische, jshepherd, j, lgao, mbabacek, mturk, myarboro, nalin, npmccallum, pgier, pjindal, pjurak, pkis, plodge, ppalaga, psakar, pslavice, rharwood, rhel-process-autobot, rnetuka, rstancel, rsvoboda, sbose, ssorce, szappis, twalsh, vchlup, vtunka, watson-tool-maintainers, weli, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:42:13 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:	1551086, 1551087, 1562679, 1562680
Bug Blocks:	1551090

Description Laura Pardo 2018-03-02 17:14:03 UTC

A flaw was found in MIT krb5 1.6 or later, an authenticated kadmin user with permission to add principals to an LDAP Kerberos database can circumvent a DN containership check by supplying both a "linkdn" and "containerdn" database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN.


Reference:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891869

Upstream patch:
https://github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1

Comment 1 Laura Pardo 2018-03-02 17:15:52 UTC

Created krb5 tracking bugs for this issue:

Affects: fedora-all [bug 1551087]

Comment 3 Robbie Harwood 2018-03-02 17:46:40 UTC

This is identical to https://bugzilla.redhat.com/show_bug.cgi?id=1535575

Comment 8 errata-xmlrpc 2018-10-30 07:29:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3071 https://access.redhat.com/errata/RHSA-2018:3071