Bug 1894567 (CVE-2020-25692)

Summary:	CVE-2020-25692 openldap: NULL pointer dereference for unauthenticated packet in slapd
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aboyko, apeddire, asoldano, atangrin, bbaranow, bmaxwell, brian.stansberry, cbuissar, cdewolf, chazlett, csutherl, darran.lofthouse, dkreling, dosoudil, eleandro, gzaronik, iweiss, jawilson, jclere, jochrist, jperkins, jwon, krathod, kwills, lgao, lnykryn, matushonek, mbabacek, mharmsen, msalle, msochure, msvehla, mturk, myarboro, nwallace, pjindal, plodge, pmackay, rguimara, rhel-process-autobot, rmeggins, rstancel, rsvoboda, scorneli, smaestri, spichugi, szappis, tom.jenkinson, vashirov, vchlup, watson-tool-maintainers, weli
Target Milestone:	---	Keywords:	Security
Target Release:	---	Flags:	spichugi: needinfo-
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openldap 2.4.55	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in the OpenLDAP server, during a request for renaming RDNs. This flaw allows a remote, unauthenticated attacker to crash the slapd process by sending a specially crafted request, causing a denial of service. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-04-27 16:46:34 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:	1895288, 1895328
Bug Blocks:	1894568

Description Guilherme de Almeida Suckevicz 2020-11-04 14:09:18 UTC

OpenLDAP slapd crashes on what seems to be a null-ptr-dereference after receiving a malicious TCP packet.

Reference:
https://bugs.openldap.org/show_bug.cgi?id=9370

Comment 1 Cedric Buissart 2020-11-06 08:47:35 UTC

Created openldap tracking bugs for this issue:

Affects: fedora-all [bug 1895288]

Comment 3 Cedric Buissart 2020-11-10 08:55:12 UTC

Upstream fixes:
Main branch :
https://git.openldap.org/openldap/openldap/-/commit/6abfd60078af02d56edb3b6897692cdd09a08971
https://git.openldap.org/openldap/openldap/-/commit/a08a2db4063f54a6217a0f091aebd02f8bdb482e

2.4 branch :
https://git.openldap.org/openldap/openldap/-/commit/4c774220a752bf8e3284984890dc0931fe73165d

Comment 6 RaTasha Tillery-Smith 2020-12-08 15:55:26 UTC

Statement:

This vulnerability affects the server side only. As a result, OpenLDAP client components, such as the component shipped in Red Hat Enterprise Linux 8, are not affected by this flaw.

Comment 10 errata-xmlrpc 2021-04-27 11:33:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:1389 https://access.redhat.com/errata/RHSA-2021:1389

Comment 11 Product Security DevOps Team 2021-04-27 16:46:34 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-25692