Bug 1535575 (CVE-2018-5710)

Summary:	CVE-2018-5710 krb5: null pointer deference in strlen function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abokovoy, apintea, bkundal, bmaxwell, cdewolf, chazlett, csutherl, darran.lofthouse, dimitris, dosoudil, dpal, fgavrilo, gzaronik, jawilson, jclere, jondruse, jplans, jshepherd, j, lgao, mbabacek, mturk, myarboro, nalin, npmccallum, pgier, pjurak, pkis, ppalaga, psakar, pslavice, rharwood, rnetuka, rstancel, rsvoboda, sbose, ssorce, sstavrev, twalsh, vtunka, weli
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:	2018-03-22 17:31:35 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:	1535576
Bug Blocks:	1535577

Description Laura Pardo 2018-01-17 16:11:50 UTC

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. The pre-defined function "strlen" is getting a "NULL" string as a parameter value in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the Key Distribution Center (KDC), which allows remote authenticated users to cause a denial of service (NULL pointer dereference) via a modified kadmin client.

References:
https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service%28DoS%29

Comment 1 Laura Pardo 2018-01-17 16:13:24 UTC

Created krb5 tracking bugs for this issue:

Affects: fedora-all [bug 1535576]

Comment 8 Doran Moppert 2020-02-10 04:37:23 UTC

Statement:

This flaw was found to be a duplicate of CVE-2018-5729. Please see https://access.redhat.com/security/cve/CVE-2018-5729 for information about affected products and security errata.