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Bug 796808 - slapd segfaults when certificate key cannot be loaded
Summary: slapd segfaults when certificate key cannot be loaded
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: openldap
Version: 6.2
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Jan Vcelak
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On: 772890
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-02-23 17:21 UTC by Jan Vcelak
Modified: 2012-08-07 13:33 UTC (History)
3 users (show)

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
Clone Of: 772890
Environment:
Last Closed: 2012-06-20 07:29:27 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2012:0899 0 normal SHIPPED_LIVE Low: openldap security and bug fix update 2012-06-19 19:28:37 UTC

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
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