Bug 1899678 (CVE-2020-25710)

Summary:	CVE-2020-25710 openldap: assertion failure in CSN normalization with invalid input
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, asoldano, atangrin, bbaranow, bmaxwell, brian.stansberry, cbuissar, cdewolf, chazlett, csutherl, darran.lofthouse, dkreling, dosoudil, eleandro, gzaronik, iweiss, jawilson, jclere, jochrist, jperkins, jwon, krathod, kwills, ldap-maint, lgao, lnykryn, matushonek, mbabacek, msalle, msochure, msvehla, mturk, myarboro, nwallace, pjindal, pmackay, rguimara, rmeggins, rstancel, rsvoboda, scorneli, smaestri, spichugi, tcrider, tcullum, tom.jenkinson, vashirov, weli
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
See Also:	https://issues.redhat.com/browse/CRW-1390 https://issues.redhat.com/browse/JBCS-1042
Whiteboard:
Fixed In Version:	openldap 2.4.56	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in OpenLDAP. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-03-02 22:20:23 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:	1899679, 1900140, 2040538
Bug Blocks:	1899680

Description Guilherme de Almeida Suckevicz 2020-11-19 19:03:08 UTC

A malicious packet can force OpenLDAP to fail an assertion in csnNormalize23 function in servers/slapd/schema_init.c.

Reference:
https://bugs.openldap.org/show_bug.cgi?id=9384

Upstream patch:
https://git.openldap.org/openldap/openldap/-/commit/bdb0d459187522a6063df13871b82ba8dcc6efe2

Comment 1 Guilherme de Almeida Suckevicz 2020-11-19 19:03:32 UTC

Created openldap tracking bugs for this issue:

Affects: fedora-all [bug 1899679]

Comment 4 Todd Cullum 2020-11-23 20:26:25 UTC

External References:

https://git.openldap.org/openldap/openldap/-/commit/ab3915154e69920d480205b4bf5ccb2b391a0a1f#a2feb6ed0257c21c6672793ee2f94eaadc10c72c

Comment 8 Todd Cullum 2020-12-02 17:54:28 UTC

Statement:

This flaw does not affect Red Hat Enterprise Linux 8 because the slapd server is not shipped in the Red Hat Enterprise Linux 8 repositories.

Comment 14 errata-xmlrpc 2022-02-22 16:59:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0621 https://access.redhat.com/errata/RHSA-2022:0621

Comment 15 Product Security DevOps Team 2022-03-02 22:20:18 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-2020-25710