(RHSA-2005:767) openldap and nss_ldap security update

ID RHSA-2005:767
Type redhat
Reporter RedHat
Modified 2017-09-08T11:55:59


OpenLDAP is an open source suite of LDAP (Lightweight Directory Access Protocol) applications and development tools.

The nss_ldap module is an extension for use with GNU libc which allows applications to, without internal modification, consult a directory service using LDAP to supplement information that would be read from local files such as /etc/passwd, /etc/group, and /etc/shadow.

A bug was found in the way OpenLDAP, nss_ldap, and pam_ldap refer LDAP servers. If a client connection is referred to a different server, it is possible that the referred connection will not be encrypted even if the client has "ssl start_tls" in its ldap.conf file. The Common Vulnerabilities and Exposures project has assigned the name CAN-2005-2069 to this issue.

A bug was found in the way the pam_ldap module processed certain failure messages. If the server includes supplemental data in an authentication failure result message, but the data does not include any specific error code, the pam_ldap module would proceed as if the authentication request had succeeded, and authentication would succeed. The Common Vulnerabilities and Exposures project has assigned the name CAN-2005-2641 to this issue.

Additionally the following issues are corrected in this erratum.

  • The OpenLDAP upgrading documentation has been updated.

  • Fix a database deadlock locking issue.

  • A fix where slaptest segfaults on exit after successful check.

  • The library libslapd_db-4.2.so is now located in an architecture-dependent directory.

  • The LDAP client no longer enters an infinite loop when the server returns a reference to itself.

  • The pam_ldap module adds the ability to check user passwords using a directory server to PAM-aware applications.

  • The directory server can now include supplemental information regarding the state of the user's account if a client indicates that it supports such a feature.

All users of OpenLDAP and nss_ldap are advised to upgrade to these updated packages, which contain backported fixes that resolve these issues.