Executive Summary

Summary
Title mod_nss security update
Informations
Name RHSA-2013:1779 First vendor Publication 2013-12-03
Vendor RedHat Last vendor Modification 2013-12-03
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:H/Au:N/C:P/I:P/A:N)
Cvss Base Score 4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity High
Cvss Expoit Score 4.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

An updated mod_nss package that fixes one security issue is now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

The mod_nss module provides strong cryptography for the Apache HTTP Server via the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, using the Network Security Services (NSS) security library.

A flaw was found in the way mod_nss handled the NSSVerifyClient setting for the per-directory context. When configured to not require a client certificate for the initial connection and only require it for a specific directory, mod_nss failed to enforce this requirement and allowed a client to access the directory when no valid client certificate was provided. (CVE-2013-4566)

Red Hat would like to thank Albert Smith of OUSD(AT&L) for reporting this issue.

All mod_nss users should upgrade to this updated package, which contains a backported patch to correct this issue. The httpd service must be restarted for this update to take effect.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/site/articles/11258

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

1016832 - CVE-2013-4566 mod_nss: incorrect handling of NSSVerifyClient in directory context

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2013-1779.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:21010
 
Oval ID: oval:org.mitre.oval:def:21010
Title: RHSA-2013:1779: mod_nss security update (Moderate)
Description: mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vhost context, does not enforce the NSSVerifyClient setting in the directory context, which allows remote attackers to bypass intended access restrictions.
Family: unix Class: patch
Reference(s): RHSA-2013:1779-00
CESA-2013:1779
CVE-2013-4566
Version: 4
Platform(s): Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
CentOS Linux 5
CentOS Linux 6
Product(s): mod_nss
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23337
 
Oval ID: oval:org.mitre.oval:def:23337
Title: DEPRECATED: ELSA-2013:1779: mod_nss security update (Moderate)
Description: mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vhost context, does not enforce the NSSVerifyClient setting in the directory context, which allows remote attackers to bypass intended access restrictions.
Family: unix Class: patch
Reference(s): ELSA-2013:1779-00
CVE-2013-4566
Version: 7
Platform(s): Oracle Linux 5
Oracle Linux 6
Product(s): mod_nss
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23961
 
Oval ID: oval:org.mitre.oval:def:23961
Title: ELSA-2013:1779: mod_nss security update (Moderate)
Description: mod_nss 1.0.8 and earlier, when NSSVerifyClient is set to none for the server/vhost context, does not enforce the NSSVerifyClient setting in the directory context, which allows remote attackers to bypass intended access restrictions.
Family: unix Class: patch
Reference(s): ELSA-2013:1779-00
CVE-2013-4566
Version: 6
Platform(s): Oracle Linux 5
Oracle Linux 6
Product(s): mod_nss
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:25458
 
Oval ID: oval:org.mitre.oval:def:25458
Title: SUSE-SU-2013:1926-1 -- Security update for apache2-mod_nss
Description: This update fixes the following security issues with apache2-mod_nss: * bnc#853039: client certificate verification problematic (CVE-2013-4566) Security Issue reference: * CVE-2013-4566 <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4566 >
Family: unix Class: patch
Reference(s): SUSE-SU-2013:1926-1
CVE-2013-4566
Version: 3
Platform(s): SUSE Linux Enterprise Server 11
Product(s): apache2-mod_nss
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27241
 
Oval ID: oval:org.mitre.oval:def:27241
Title: DEPRECATED: ELSA-2013-1779 -- mod_nss security update (moderate)
Description: [1.0.8-19] - Resolves: CVE-2013-4566 - Bugzilla Bug #1030265 - mod_nss: incorrect handling of NSSVerifyClient in directory context [rhel-6.5.z]
Family: unix Class: patch
Reference(s): ELSA-2013-1779
CVE-2013-4566
Version: 4
Platform(s): Oracle Linux 5
Oracle Linux 6
Product(s): mod_nss
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 2

Nessus® Vulnerability Scanner

Date Description
2016-09-28 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-2396-1.nasl - Type : ACT_GATHER_INFO
2016-09-19 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-2329-1.nasl - Type : ACT_GATHER_INFO
2016-09-13 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2016-2285-1.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2013-1030.nasl - Type : ACT_GATHER_INFO
2014-02-04 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2013-253.nasl - Type : ACT_GATHER_INFO
2013-12-23 Name : The remote SuSE 11 host is missing a security update.
File : suse_11_apache2-mod_nss-131203.nasl - Type : ACT_GATHER_INFO
2013-12-14 Name : The remote Fedora host is missing a security update.
File : fedora_2013-22730.nasl - Type : ACT_GATHER_INFO
2013-12-13 Name : The remote Fedora host is missing a security update.
File : fedora_2013-22786.nasl - Type : ACT_GATHER_INFO
2013-12-13 Name : The remote Fedora host is missing a security update.
File : fedora_2013-22787.nasl - Type : ACT_GATHER_INFO
2013-12-10 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2013-254.nasl - Type : ACT_GATHER_INFO
2013-12-10 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20131203_mod_nss_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2013-12-04 Name : The remote CentOS host is missing a security update.
File : centos_RHSA-2013-1779.nasl - Type : ACT_GATHER_INFO
2013-12-04 Name : The remote Oracle Linux host is missing a security update.
File : oraclelinux_ELSA-2013-1779.nasl - Type : ACT_GATHER_INFO
2013-12-04 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2013-1779.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
3
Date Informations
2014-02-17 11:57:40
  • Multiple Updates
2013-12-13 21:28:28
  • Multiple Updates
2013-12-12 21:24:34
  • Multiple Updates
2013-12-03 21:18:27
  • First insertion