REDHAT-BUG-1019490
First published: Tue Oct 15 2013(Updated: )
It was discovered that OpenLDAP, with the rwm overlay to slapd, could segfault if a user were able to query the directory and immediately unbind from the server. This seems to be due to the rwm overlay not doing reference counting properly, so rwm_conn_destroy frees the session context while rwm_op_search is using it. This condition also seems to require multiple cores/CPUs to trigger. This was also reported upstream [1] and is currently unfixed. [1] <a href="http://www.openldap.org/its/index.cgi/Incoming?id=7723">http://www.openldap.org/its/index.cgi/Incoming?id=7723</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenLDAP |
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Reference Links
- http://www.openldap.org/its/index.cgi/Incoming?id=7723
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1019490#c0
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1060851
- https://rhn.redhat.com/errata/RHSA-2014-0126.html
- https://rhn.redhat.com/errata/RHSA-2014-0206.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1019490
Frequently Asked Questions
What is the severity of REDHAT-BUG-1019490?
The severity of REDHAT-BUG-1019490 is considered moderate due to the potential for denial of service through a segmentation fault.
How do I fix REDHAT-BUG-1019490?
Fixing REDHAT-BUG-1019490 involves updating OpenLDAP to the latest patched version that addresses the reference counting issue.
Which versions of OpenLDAP are affected by REDHAT-BUG-1019490?
REDHAT-BUG-1019490 affects versions of OpenLDAP that implement the rwm overlay to slapd.
What causes the issue in REDHAT-BUG-1019490?
The issue in REDHAT-BUG-1019490 is caused by improper reference counting in the rwm overlay, leading to a segmentation fault when a client unbinds immediately after querying.
Can REDHAT-BUG-1019490 be exploited remotely?
Yes, REDHAT-BUG-1019490 can potentially be exploited remotely if an attacker can query the OpenLDAP server and then unbind quickly.
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