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Bug 796808

Summary:	slapd segfaults when certificate key cannot be loaded
Product:	Red Hat Enterprise Linux 6	Reporter:	Jan Vcelak <jvcelak>
Component:	openldap	Assignee:	Jan Vcelak <jvcelak>
Status:	CLOSED ERRATA	QA Contact:	BaseOS QE Security Team <qe-baseos-security>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.2	CC:	jsynacek, omoris, tsmetana
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openldap-2.4.23-21.el6	Doc Type:	Bug Fix
Doc Text:	- openldap server configured to use TLS, some problem when loading server key appears - server crashes with segmentation fault due to accessing uninitialized memory - applied patch to initialize variables holding TLS certificate and key correctly - server no longer crashes in described situation, but log the information about to failure and continues in execution	Story Points:	---
Clone Of:	772890	Environment:
Last Closed:	2012-06-20 07:29:27 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:	772890
Bug Blocks:

Description Jan Vcelak 2012-02-23 17:21:32 UTC

Found out that this appers even with perfectly correct configuration, when PK11_FindCertFromNickname fails. RHEL is affected, must be fixed.

+++ This bug was initially created as a clone of Bug #772890 +++

Description of problem:

slapd segfaults when PEM certificate is used and olcTLSCertificateKeyFile is not set

Version-Release number of selected component (if applicable):

openldap-2.4.26-5.fc16.x86_64, upstream git master

Steps to Reproduce:
# ldapmodify -H ldapi:// -Y external 
dn: cn=config
changetype: modify
replace: olcTLSCertificateKeyFile

# systemctl slapd stop
# slapd -u ldap -d1

$ ldapsearch -x -ZZ -H ldap://server
  
Actual results:

TLS: loaded CA certificate file /etc/pki/tls/certs/ca-bundle.crt.
TLS: error: could not find the private key for certificate PEM Token #0:slapd.pem - 0 - error -12285:Unable to find the certificate or key necessary for authentication.
TLS: error: unable to find and verify server's cert and key for certificate PEM Token #0:slapd.pem - 0
Segmentation fault

Expected results:

server will not crash

Additional info:

--- Additional comment from jvcelak on 2012-01-10 10:15:37 CET ---

Created attachment 551797 [details]
proposed patch (against git master)

Crashes due to randomly initialized *serverKey pointer, which is untouched in tlsm_find_and_verify_cert_key and then tried to be freed with SECKEY_DestroyPrivateKey

--- Additional comment from jvcelak on 2012-01-20 12:29:50 CET ---

Not critical, changing version to "rawhide".

--- Additional comment from jvcelak on 2012-01-25 16:59:19 CET ---

Thank you for the review, Rich.

Patch submitted upstream:
http://www.openldap.org/its/index.cgi?findid=7135

--- Additional comment from jvcelak on 2012-01-31 18:48:34 CET ---

Fixed in:
openldap-2.4.26-6.fc16
openldap-2.4.28-3.fc17

--- Additional comment from updates on 2012-01-31 18:51:07 CET ---

openldap-2.4.26-6.fc16 has been submitted as an update for Fedora 16.
https://admin.fedoraproject.org/updates/openldap-2.4.26-6.fc16

--- Additional comment from updates on 2012-02-01 20:26:52 CET ---

Package openldap-2.4.26-6.fc16:
* should fix your issue,
* was pushed to the Fedora 16 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing openldap-2.4.26-6.fc16'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2012-1135/openldap-2.4.26-6.fc16
then log in and leave karma (feedback).

--- Additional comment from updates on 2012-02-17 01:57:55 CET ---

openldap-2.4.26-6.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Jan Vcelak 2012-03-01 15:56:54 UTC

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
- openldap server configured to use TLS, some problem when loading server key appears
- server crashes with segmentation fault due to accessing uninitialized memory
- applied patch to initialize variables holding TLS certificate and key correctly
- server no longer crashes in described situation, but log  the information about to failure and continues in execution

Comment 8 errata-xmlrpc 2012-06-20 07:29:27 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0899.html