[ GLSA 200403-12 ] OpenLDAP DoS Vulnerability

["Joshua J. Berry" <condordes () gentoo org>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200403-12
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                             http://security.gentoo.org
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: OpenLDAP DoS Vulnerability
      Date: March 31, 2004
      Bugs: #26728
        ID: 200403-12

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

A failed password operation can cause the OpenLDAP slapd server, if it
is using the back-ldbm backend, to free memory that was never
allocated.

Background
==========

OpenLDAP is a suite of LDAP-related application and development tools.
It includes slapd (the standalone LDAP server), slurpd (the standalone
LDAP replication server), and various LDAP libraries, utilities and
example clients.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /   Vulnerable   /                   Unaffected
    -------------------------------------------------------------------
     net-nds/openldap       <= 2.1.12                        >= 2.1.13

Description
===========

A password extended operation (password EXOP) which fails will cause
the slapd server to free() an uninitialized pointer, possibly resulting
in a segfault. This only affects servers using the back-ldbm backend.

Such a crash is not guaranteed with every failed operation, however, it
is possible.

Impact
======

An attacker (or indeed, a normal user) may crash the OpenLDAP server,
creating a Denial of Service condition.

Workaround
==========

A workaround is not currently known for this issue. All users are
advised to upgrade to the latest version of the affected package.

Resolution
==========

OpenLDAP users should upgrade to version 2.1.13 or later:

    # emerge sync

    # emerge -pv ">=net-nds/openldap-2.1.13"
    # emerge ">=net-nds/openldap-2.1.13"

References
==========

  [ 1 ] http://www.openldap.org/its/index.cgi?findid=2390

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFAaqlSaIxeYlQMsxsRAnHfAJ4rCNT2xaNZgeOGForGj7/LiPcOOwCfZ93n
a8lahYw+HrEJt/jgTrn0JFM=
=5+Yj
-----END PGP SIGNATURE-----