Executive Summary

Summary
Title krb5 security and bug fix update
Informations
Name RHSA-2010:0343 First vendor Publication 2010-04-06
Vendor RedHat Last vendor Modification 2010-04-06
Severity (Vendor) Important 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:S/C:N/I:N/A:P)
Cvss Base Score 4 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

Updated krb5 packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important 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:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - 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).

A use-after-free flaw was discovered in the MIT Kerberos administration daemon, kadmind. A remote, authenticated attacker could use this flaw to crash the kadmind daemon. Administrative privileges are not required to trigger this flaw, as any realm user can request information about their own principal from kadmind. (CVE-2010-0629)

This update also fixes the following bug:

* when a Kerberos client seeks tickets for use with a service, it must contact the Key Distribution Center (KDC) to obtain them. The client must also determine which realm the service belongs to and it typically does this with a combination of client configuration detail, DNS information and guesswork.

If the service belongs to a realm other than the client's, cross-realm authentication is required. Using a combination of client configuration and guesswork, the client determines the trust relationship sequence which forms the trusted path between the client's realm and the service's realm. This may include one or more intermediate realms.

Anticipating the KDC has better knowledge of extant trust relationships, the client then requests a ticket from the service's KDC, indicating it will accept guidance from the service's KDC by setting a special flag in the request. A KDC which recognizes the flag can, at its option, return a ticket-granting ticket for the next realm along the trust path the client should be following.

If the ticket-granting ticket returned by the service's KDC is for use with a realm the client has already determined was in the trusted path, the client accepts this as an optimization and continues. If, however, the ticket is for use in a realm the client is not expecting, the client responds incorrectly: it treats the case as an error rather than continuing along the path suggested by the service's KDC.

For this update, the krb5 1.7 modifications which allow the client to trust such KDCs to send them along the correct path, resulting in the client obtaining the tickets it originally desired, were backported to krb 1.6.1 (the version shipped with Red Hat Enterprise Linux 5.5). (BZ#578540)

All krb5 users should upgrade to these updated packages, which contain backported patches to correct these issues. All running KDC services must be restarted for the 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 http://kbase.redhat.com/faq/docs/DOC-11259

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

576011 - CVE-2010-0629 krb5: kadmind use-after-free remote crash (MITKRB5-SA-2010-003) 578540 - [RFE] Backport referral-chasing code within krb5-1.7 to RHEL5

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2010-0343.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:20259
 
Oval ID: oval:org.mitre.oval:def:20259
Title: DSA-2031-1 krb5 - denial of service
Description: Sol Jerome discovered that kadmind service in krb5, a system for authenticating users and services on a network, allows remote authenticated users to cause a denial of service (daemon crash) via a request from a kadmin client that sends an invalid API version number.
Family: unix Class: patch
Reference(s): DSA-2031-1
CVE-2010-0629
Version: 5
Platform(s): Debian GNU/Linux 5.0
Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22037
 
Oval ID: oval:org.mitre.oval:def:22037
Title: RHSA-2010:0343: krb5 security and bug fix update (Important)
Description: Use-after-free vulnerability in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote authenticated users to cause a denial of service (daemon crash) via a request from a kadmin client that sends an invalid API version number.
Family: unix Class: patch
Reference(s): RHSA-2010:0343-01
CESA-2010:0343
CVE-2010-0629
Version: 4
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:23005
 
Oval ID: oval:org.mitre.oval:def:23005
Title: ELSA-2010:0343: krb5 security and bug fix update (Important)
Description: Use-after-free vulnerability in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote authenticated users to cause a denial of service (daemon crash) via a request from a kadmin client that sends an invalid API version number.
Family: unix Class: patch
Reference(s): ELSA-2010:0343-01
CVE-2010-0629
Version: 6
Platform(s): Oracle Linux 5
Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:28012
 
Oval ID: oval:org.mitre.oval:def:28012
Title: DEPRECATED: ELSA-2010-0343 -- krb5 security and bug fix update (important)
Description: [1.6.1-36.el5_5.3] - add upstream patch to fix a few use-after-free bugs, including one in kadmind (CVE-2010-0629, #578185) [1.6.1-36.el5_5.2] - pull changes to libkrb5 to properly handle and chase off-path referrals back from 1.7 (#574387)
Family: unix Class: patch
Reference(s): ELSA-2010-0343
CVE-2010-0629
Version: 4
Platform(s): Oracle Linux 5
Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:6724
 
Oval ID: oval:org.mitre.oval:def:6724
Title: DSA-2031 krb5 -- use-after-free
Description: Sol Jerome discovered that kadmind service in krb5, a system for authenticating users and services on a network, allows remote authenticated users to cause a denial of service via a request from a kadmin client that sends an invalid API version number.
Family: unix Class: patch
Reference(s): DSA-2031
CVE-2010-0629
Version: 5
Platform(s): Debian GNU/Linux 5.0
Product(s): krb5
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:9489
 
Oval ID: oval:org.mitre.oval:def:9489
Title: Use-after-free vulnerability in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote authenticated users to cause a denial of service (daemon crash) via a request from a kadmin client that sends an invalid API version number.
Description: Use-after-free vulnerability in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote authenticated users to cause a denial of service (daemon crash) via a request from a kadmin client that sends an invalid API version number.
Family: unix Class: vulnerability
Reference(s): CVE-2010-0629
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 39
Os 3
Os 1
Os 2
Os 1

OpenVAS Exploits

Date Description
2012-02-12 Name : Gentoo Security Advisory GLSA 201201-13 (mit-krb5)
File : nvt/glsa_201201_13.nasl
2011-08-09 Name : CentOS Update for krb5-devel CESA-2010:0343 centos5 i386
File : nvt/gb_CESA-2010_0343_krb5-devel_centos5_i386.nasl
2010-05-28 Name : Fedora Update for krb5 FEDORA-2010-8796
File : nvt/gb_fedora_2010_8796_krb5_fc11.nasl
2010-04-21 Name : FreeBSD Ports: krb5
File : nvt/freebsd_krb52.nasl
2010-04-16 Name : Mandriva Update for krb5 MDVSA-2010:071 (krb5)
File : nvt/gb_mandriva_MDVSA_2010_071.nasl
2010-04-09 Name : RedHat Update for krb5 RHSA-2010:0343-01
File : nvt/gb_RHSA-2010_0343-01_krb5.nasl
2010-04-09 Name : Fedora Update for krb5 FEDORA-2010-6108
File : nvt/gb_fedora_2010_6108_krb5_fc11.nasl
2010-04-09 Name : Ubuntu Update for krb5 vulnerabilities USN-924-1
File : nvt/gb_ubuntu_USN_924_1.nasl
2010-02-19 Name : Mandriva Update for eject MDVA-2010:071 (eject)
File : nvt/gb_mandriva_MDVA_2010_071.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
63569 Kerberos src/kadmin/server/server_stubs.c init_2_svc() Function API Version N...

Nessus® Vulnerability Scanner

Date Description
2014-11-26 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2011-0015.nasl - Type : ACT_GATHER_INFO
2013-07-12 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2010-0343.nasl - Type : ACT_GATHER_INFO
2013-03-09 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-924-1.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20100406_krb5_on_SL5_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
2010-12-02 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_krb5-100401.nasl - Type : ACT_GATHER_INFO
2010-07-01 Name : The remote Fedora host is missing a security update.
File : fedora_2010-6108.nasl - Type : ACT_GATHER_INFO
2010-06-01 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2010-0343.nasl - Type : ACT_GATHER_INFO
2010-05-11 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2010-0343.nasl - Type : ACT_GATHER_INFO
2010-04-20 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_a30573dc489311dfa5f9001641aeabdf.nasl - Type : ACT_GATHER_INFO
2010-04-14 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2010-071.nasl - Type : ACT_GATHER_INFO
2010-04-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_0_krb5-100401.nasl - Type : ACT_GATHER_INFO
2010-04-13 Name : The remote openSUSE host is missing a security update.
File : suse_11_1_krb5-100401.nasl - Type : ACT_GATHER_INFO
2010-04-12 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-2031.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2014-02-17 11:53:26
  • Multiple Updates