Executive Summary

Summary
Title openldap and nss_ldap security update
Informations
Name RHSA-2005:751 First vendor Publication 2005-10-17
Vendor RedHat Last vendor Modification 2005-10-17
Severity (Vendor) Moderate Revision 01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated openldap and nss_ldap packages that correct a potential password disclosure issue are now available.
This update has been rated as having moderate security impact by the Red Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64 Red Hat Linux Advanced Workstation 2.1 - ia64 Red Hat Enterprise Linux ES version 2.1 - i386 Red Hat Enterprise Linux WS version 2.1 - i386 Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Desktop version 3 - i386, x86_64 Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

3. Problem description:

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 also found in the way certain OpenLDAP authentication schemes store hashed passwords. A remote attacker could re-use a hashed password to gain access to unauthorized resources. The Common Vulnerabilities and Exposures project has assigned the name CAN-2004-0823 to this issue.

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

4. Solution:

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

This update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

156386 - CAN-2004-0823 openldap hashed password re-use 162482 - CAN-2005-2069 openldap password disclosure issue

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2005-751.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-319 Cleartext Transmission of Sensitive Information

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:10703
 
Oval ID: oval:org.mitre.oval:def:10703
Title: OpenLDAP 1.0 through 2.1.19, as used in Apple Mac OS 10.3.4 and 10.3.5 and possibly other operating systems, may allow certain authentication schemes to use hashed (crypt) passwords in the userPassword attribute as if they were plaintext passwords, which allows remote attackers to re-use hashed passwords without decrypting them.
Description: OpenLDAP 1.0 through 2.1.19, as used in Apple Mac OS 10.3.4 and 10.3.5 and possibly other operating systems, may allow certain authentication schemes to use hashed (crypt) passwords in the userPassword attribute as if they were plaintext passwords, which allows remote attackers to re-use hashed passwords without decrypting them.
Family: unix Class: vulnerability
Reference(s): CVE-2004-0823
Version: 5
Platform(s): Red Hat Enterprise Linux 3
CentOS Linux 3
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:9445
 
Oval ID: oval:org.mitre.oval:def:9445
Title: pam_ldap and nss_ldap, when used with OpenLDAP and connecting to a slave using TLS, does not use TLS for the subsequent connection if the client is referred to a master, which may cause a password to be sent in cleartext and allows remote attackers to sniff the password.
Description: pam_ldap and nss_ldap, when used with OpenLDAP and connecting to a slave using TLS, does not use TLS for the subsequent connection if the client is referred to a master, which may cause a password to be sent in cleartext and allows remote attackers to sniff the password.
Family: unix Class: vulnerability
Reference(s): CVE-2005-2069
Version: 5
Platform(s): Red Hat Enterprise Linux 3
CentOS Linux 3
Red Hat Enterprise Linux 4
CentOS Linux 4
Oracle Linux 4
Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 64
Application 1
Application 1
Os 3
Os 3

OpenVAS Exploits

Date Description
2009-10-10 Name : SLES9: Security update for pam_ldap
File : nvt/sles9p5015275.nasl
2009-10-10 Name : SLES9: Security update for openldap2-client,openldap2-devel
File : nvt/sles9p5016606.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200507-13 (pam_ldap nss_ldap)
File : nvt/glsa_200507_13.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
17692 OpenLDAP / pam_ldap TLS Connection Cleartext Password Disclosure

9784 OpenLDAP CRYPT Password Cleartext Transmission

OpenLDAP contains a flaw that may allow a malicious user to gain access with knowledge of the CRYPT password. The issue is triggered when the CRYPT password is validated as plaintext. It is possible that the flaw may allow unauthorized access resulting in a loss of confidentiality, and integrity.

Nessus® Vulnerability Scanner

Date Description
2006-07-05 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2005-767.nasl - Type : ACT_GATHER_INFO
2006-07-03 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2005-751.nasl - Type : ACT_GATHER_INFO
2006-01-15 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-152-1.nasl - Type : ACT_GATHER_INFO
2005-10-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2005-751.nasl - Type : ACT_GATHER_INFO
2005-10-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2005-767.nasl - Type : ACT_GATHER_INFO
2005-08-30 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-785.nasl - Type : ACT_GATHER_INFO
2005-07-19 Name : The remote Mandrake Linux host is missing one or more security updates.
File : mandrake_MDKSA-2005-121.nasl - Type : ACT_GATHER_INFO
2005-07-14 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200507-13.nasl - Type : ACT_GATHER_INFO
2004-09-08 Name : The remote host is missing a Mac OS X update that fixes a security issue.
File : macosx_SecUpd20040907.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:49:38
  • Multiple Updates