Executive Summary

Summary
Title krb5 security update
Informations
Name RHSA-2011:1379 First vendor Publication 2011-10-18
Vendor RedHat Last vendor Modification 2011-10-18
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:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated krb5 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - 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:

Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC).

Multiple NULL pointer dereference and assertion failure flaws were found in the MIT Kerberos KDC when it was configured to use an LDAP (Lightweight Directory Access Protocol) or Berkeley Database (Berkeley DB) back end. A remote attacker could use these flaws to crash the KDC. (CVE-2011-1527, CVE-2011-1528, CVE-2011-1529)

Red Hat would like to thank the MIT Kerberos project for reporting the CVE-2011-1527 issue. Upstream acknowledges Andrej Ota as the original reporter of CVE-2011-1527.

All krb5 users should upgrade to these updated packages, which contain a backported patch to correct these issues. After installing the updated packages, the krb5kdc daemon will be restarted automatically.

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/kb/docs/DOC-11259

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

737711 - CVE-2011-1527 CVE-2011-1528 CVE-2011-1529 krb5: KDC denial of service vulnerabilities (MITKRB5-SA-2011-006)

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2011-1379.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:14768
 
Oval ID: oval:org.mitre.oval:def:14768
Title: DSA-2379-1 krb5 -- several
Description: It was discovered that the Key Distribution Center in Kerberos 5 crashes when processing certain crafted requests: CVE-2011-1528 When the LDAP backend is used, remote users can trigger a KDC daemon crash and denial of service. CVE-2011-1529 When the LDAP or Berkeley DB backend is used, remote users can trigger a NULL pointer dereference in the KDC daemon and a denial of service. The oldstable distribution is not affected by these problems.
Family: unix Class: patch
Reference(s): DSA-2379-1
CVE-2011-1528
CVE-2011-1529
 Version: 5
Platform(s): Debian GNU/Linux 6.0
Debian GNU/kFreeBSD 6.0
 Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:21260
 
Oval ID: oval:org.mitre.oval:def:21260
Title: USN-1233-1 -- krb5 vulnerabilities
Description: Several denial of service issues were fixed in the Kerberos Key Distribution Center (KDC).
Family: unix Class: patch
Reference(s): USN-1233-1
CVE-2011-1527
CVE-2011-1528
CVE-2011-1529
 Version: 5
Platform(s): Ubuntu 11.10
Ubuntu 11.04
Ubuntu 10.10
Ubuntu 10.04
 Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22017
 
Oval ID: oval:org.mitre.oval:def:22017
Title: RHSA-2011:1379: krb5 security update (Moderate)
Description: The lookup_lockout_policy function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8 through 1.8.4 and 1.9 through 1.9.1, when the db2 (aka Berkeley DB) or LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via vectors that trigger certain process_as_req errors.
Family: unix Class: patch
Reference(s): RHSA-2011:1379-01
CVE-2011-1527
CVE-2011-1528
CVE-2011-1529
 Version: 42
Platform(s): Red Hat Enterprise Linux 6
 Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23734
 
Oval ID: oval:org.mitre.oval:def:23734
Title: ELSA-2011:1379: krb5 security update (Moderate)
Description: The lookup_lockout_policy function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8 through 1.8.4 and 1.9 through 1.9.1, when the db2 (aka Berkeley DB) or LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via vectors that trigger certain process_as_req errors.
Family: unix Class: patch
Reference(s): ELSA-2011:1379-01
CVE-2011-1527
CVE-2011-1528
CVE-2011-1529
 Version: 17
Platform(s): Oracle Linux 6
 Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27989
 
Oval ID: oval:org.mitre.oval:def:27989
Title: DEPRECATED: ELSA-2011-1379 -- krb5 security update (moderate)
Description: [1.9-9.2] - apply upstream patch to fix a null pointer derference with the LDAP kdb backend (CVE-2011-1527), an assertion failure with multiple kdb backends (CVE-2011-1528), and a null pointer dereference with multiple kdb backends (CVE-2011-1529) (#740084)
Family: unix Class: patch
Reference(s): ELSA-2011-1379
CVE-2011-1527
CVE-2011-1528
CVE-2011-1529
 Version: 4
Platform(s): Oracle Linux 6
 Product(s): krb5
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7

OpenVAS Exploits

Date Description
2012-07-09 Name : RedHat Update for krb5 RHSA-2011:1379-01
File : nvt/gb_RHSA-2011_1379-01_krb5.nasl
2012-06-15 Name : Fedora Update for krb5 FEDORA-2012-8805
File : nvt/gb_fedora_2012_8805_krb5_fc15.nasl
2012-02-12 Name : Gentoo Security Advisory GLSA 201201-13 (mit-krb5)
File : nvt/glsa_201201_13.nasl
2012-02-11 Name : Debian Security Advisory DSA 2379-1 (krb5)
File : nvt/deb_2379_1.nasl
2012-02-01 Name : Fedora Update for krb5 FEDORA-2011-16284
File : nvt/gb_fedora_2011_16284_krb5_fc15.nasl
2011-11-18 Name : Fedora Update for krb5 FEDORA-2011-14650
File : nvt/gb_fedora_2011_14650_krb5_fc14.nasl
2011-11-18 Name : Fedora Update for krb5 FEDORA-2011-14673
File : nvt/gb_fedora_2011_14673_krb5_fc15.nasl
2011-10-31 Name : Mandriva Update for krb5 MDVSA-2011:160 (krb5)
File : nvt/gb_mandriva_MDVSA_2011_160.nasl
2011-10-21 Name : Ubuntu Update for krb5 USN-1233-1
File : nvt/gb_ubuntu_USN_1233_1.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
76661 Kerberos KDC lookup_lockout_policy() Function NULL Pointer Dereference Remote...
76660 Kerberos KDC krb5_ldap_get_principal() Function NULL Pointer Dereference Remo...
76659 Kerberos KDC Multiple Function Assertation Weakness Remote DoS

Snort® IPS/IDS

Date Description
2014-01-10 MIT Kerberos kdb_ldap plugin kinit operation denial of service attempt
RuleID : 26575 - Revision : 3 - Type : SERVER-OTHER

Nessus® Vulnerability Scanner

Date Description
2015-01-19 Name : The remote Solaris system is missing a security patch for third-party software.
File : solaris11_kerberos_20130702.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_3_krb5-111019.nasl - Type : ACT_GATHER_INFO
2014-06-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_4_krb5-111019.nasl - Type : ACT_GATHER_INFO
2013-09-04 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2011-15.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2011-1379.nasl - Type : ACT_GATHER_INFO
2012-09-06 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2011-159.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20111018_krb5_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2012-01-24 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201201-13.nasl - Type : ACT_GATHER_INFO
2012-01-12 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2379.nasl - Type : ACT_GATHER_INFO
2011-11-16 Name : The remote Fedora host is missing a security update.
File : fedora_2011-14650.nasl - Type : ACT_GATHER_INFO
2011-11-16 Name : The remote Fedora host is missing a security update.
File : fedora_2011-14673.nasl - Type : ACT_GATHER_INFO
2011-10-24 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2011-160.nasl - Type : ACT_GATHER_INFO
2011-10-19 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2011-1379.nasl - Type : ACT_GATHER_INFO
2011-10-19 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-1233-1.nasl - Type : ACT_GATHER_INFO

Alert History

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0
Date Informations
2014-02-17 11:55:12
  • Multiple Updates