7.8 - RHSA-2008:0858

Problem Description:

Updated redhat-ds-base packages are now available that fix security issues and various bugs for Red Hat Enterprise IPA.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat IPA 1 for RHEL 5 Server - i386, x86_64

3. Description:

Red Hat Directory Server is an LDAPv3-compliant directory server.

Multiple memory leaks were identified in the Directory Server. An unauthenticated remote attacker could use these flaws to trigger high memory consumption in the Directory Server, possibly causing it to crash or terminate unexpectedly when the server ran out of available memory. (CVE-2008-3283)

Ulf Weltman of Hewlett-Packard discovered a flaw in the way Directory Server handled LDAP search requests with patterns. A remote attacker with access to the LDAP service could create a search request that, when the search pattern was matched against specially crafted data records, caused Directory Server to use a large amount of CPU time. Directory Server did not impose time limits on such search requests. In this updated package, Directory Server imposes a configurable limit on the pattern-search query run time, with the default limit set to 30 seconds. (CVE-2008-2930)

In addition to these security fixes, the following bugs have been fixed in these updated packages:

* The change sequence numbers in multi-master replication had a built-in time skew to accommodate differences in the clocks on master servers. Under certain circumstances, this skew exceeded the maximum allowable skew, causing replication to stop entirely.
* If an entry with a large attribute value, such as over 32KB, was replicated, the replication could fail with a DB_BUFFER_SMALL error.

* If a password policy attribute such as accountunlocktime was added to an entry, the server would attempt to replicate that attribute, causing replication to fail.

* In replication scenarios, if an attribute value was scheduled to be deleted and also was indexed or had an attribute subtype which was indexed, the Directory Server would crash during the index operation.

* On x86_64 systems, recursively adding groups as members to other groups could crash the server because the stack size for the memberOf plug-in on 64-bit systems was hard-coded to 256KB, regardless of the ulimit value.

* A problem in the SASL IO handling meant that memory was not reallocated after SASL binds. For example, a simple bind coming immediately after a SASL bind might have failed.

All users of Red Hat Directory Server 8.0 should upgrade to these updated packages, which resolve these issues.

4. Solution:

Before applying this update, make sure that all previously-released errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/FAQ_58_10188.

5. Bugs fixed (http://bugzilla.redhat.com/):

454065 - CVE-2008-2930 Directory Server: temporary DoS via crafted pattern searches 458977 - CVE-2008-3283 Directory Server: multiple memory leaks