Executive Summary
Summary | |
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Title | krb5 security and bug fix update |
Informations | |||
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Name | RHSA-2012:0306 | First vendor Publication | 2012-02-21 |
Vendor | RedHat | Last vendor Modification | 2012-02-21 |
Severity (Vendor) | Low | Revision | 03 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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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:P/I:P/A:P) | |||
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Cvss Base Score | 6.5 | Attack Range | Network |
Cvss Impact Score | 6.4 | 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 various bugs are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low 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). It was found that ftpd, a Kerberos-aware FTP server, did not properly drop privileges. On Red Hat Enterprise Linux 5, the ftpd daemon did not check for the potential failure of the effective group ID change system call. If the group ID change failed, a remote FTP user could use this flaw to gain unauthorized read or write access to files that are owned by the root group. (CVE-2011-1526) Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter. This update also fixes the following bugs: * Due to a mistake in the Kerberos libraries, a client could fail to contact a Key Distribution Center (KDC) or terminate unexpectedly if the client had already more than 1024 file descriptors in use. This update backports modifications to the Kerberos libraries and the libraries use the poll() function instead of the select() function, as poll() does not have this limitation. (BZ#701444) * The KDC failed to release memory when processing a TGS (ticket-granting server) request from a client if the client request included an authenticator with a subkey. As a result, the KDC consumed an excessive amount of memory. With this update, the code releasing the memory has been added and the problem no longer occurs. (BZ#708516) * Under certain circumstances, if services requiring Kerberos authentication sent two authentication requests to the authenticating server, the second authentication request was flagged as a replay attack. As a result, the second authentication attempt was denied. This update applies an upstream patch that fixes this bug. (BZ#713500) * Previously, if Kerberos credentials had expired, the klist command could terminate unexpectedly with a segmentation fault when invoked with the -s option. This happened when klist encountered and failed to process an entry with no realm name while scanning the credential cache. With this update, the underlying code has been modified and the command handles such entries correctly. (BZ#729067) * Due to a regression, multi-line FTP macros terminated prematurely with a segmentation fault. This occurred because the previously-added patch failed to properly support multi-line macros. This update restores the support for multi-line macros and the problem no longer occurs. (BZ#735363, BZ#736132) All users of krb5 are advised to upgrade to these updated packages, which 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 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/): 701444 - Fix libkrb5 to work when > 1024 file descriptors are in use 708516 - memory leak during kdc TGS request 711419 - CVE-2011-1526 krb5, krb5-appl: ftpd incorrect group privilege dropping (MITKRB5-SA-2011-005) 729067 - klist -s segfaults with expired credentials 750823 - Newly introduced defect into krb5 |
Original Source
Url : https://rhn.redhat.com/errata/RHSA-2012-0306.html |
CWE : Common Weakness Enumeration
% | Id | Name |
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100 % | CWE-269 | Improper Privilege Management |
OVAL Definitions
Definition Id: oval:org.mitre.oval:def:12828 | |||
Oval ID: | oval:org.mitre.oval:def:12828 | ||
Title: | DSA-2283-1 krb5-appl -- programming error | ||
Description: | Tim Zingelmann discovered that due an incorrect configure script the kerborised FTP server failed to set the effective GID correctly, resulting in privilege escalation. The oldstable distribution is not affected. | ||
Family: | unix | Class: | patch |
Reference(s): | DSA-2283-1 CVE-2011-1526 | Version: | 7 |
Platform(s): | Debian GNU/Linux 6.0 Debian GNU/kFreeBSD 6.0 | Product(s): | krb5-appl |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:21089 | |||
Oval ID: | oval:org.mitre.oval:def:21089 | ||
Title: | RHSA-2012:0306: krb5 security and bug fix update (Low) | ||
Description: | ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script. | ||
Family: | unix | Class: | patch |
Reference(s): | RHSA-2012:0306-03 CVE-2011-1526 | Version: | 4 |
Platform(s): | Red Hat Enterprise Linux 5 | Product(s): | krb5 |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:21313 | |||
Oval ID: | oval:org.mitre.oval:def:21313 | ||
Title: | RHSA-2011:0920: krb5-appl security update (Important) | ||
Description: | ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script. | ||
Family: | unix | Class: | patch |
Reference(s): | RHSA-2011:0920-01 CVE-2011-1526 | Version: | 4 |
Platform(s): | Red Hat Enterprise Linux 6 | Product(s): | krb5-appl |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:23140 | |||
Oval ID: | oval:org.mitre.oval:def:23140 | ||
Title: | ELSA-2011:0920: krb5-appl security update (Important) | ||
Description: | ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script. | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2011:0920-01 CVE-2011-1526 | Version: | 6 |
Platform(s): | Oracle Linux 6 | Product(s): | krb5-appl |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:23359 | |||
Oval ID: | oval:org.mitre.oval:def:23359 | ||
Title: | ELSA-2012:0306: krb5 security and bug fix update (Low) | ||
Description: | ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script. | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2012:0306-03 CVE-2011-1526 | Version: | 6 |
Platform(s): | Oracle Linux 5 | Product(s): | krb5 |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:27892 | |||
Oval ID: | oval:org.mitre.oval:def:27892 | ||
Title: | DEPRECATED: ELSA-2012-0306 -- krb5 security and bug fix update (low) | ||
Description: | [1.6.1-70.el5] - add upstream patch for telnetd buffer overflow (CVE-2011-4862, #770351) [1.6.1-69.el5] - ftp: fix a static analysis should-never-happen NULL dereference (#750823) [1.6.1-68.el5] - backport fixes to teach libkrb5 to use descriptors higher than FD_SETSIZE to talk to a KDC by using poll() if it's detected at compile-time, revised (#701444, RT#6905) [1.6.1-67.el5] - add backported patch by way of jbarbuc to free subkeys created by the KDC while processing TGS requests (#708516) [1.6.1-66.el5] - add backported patch by way of several people to better avoid false detection of replay attacks when talking to systems with coarse time resolution (#713500) [1.6.1-65.el5] - ftpd: add backported patch to check for errors when calling setegid (MITKRB5-SA-2011-005, CVE-2011-1526, #719098) [1.6.1-64.el5] - klist: don't trip over referral entries when invoked with -s (#729067, RT#6915) | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2012-0306 CVE-2011-1526 | Version: | 4 |
Platform(s): | Oracle Linux 5 | Product(s): | krb5 |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:28085 | |||
Oval ID: | oval:org.mitre.oval:def:28085 | ||
Title: | DEPRECATED: ELSA-2011-0920 -- krb5-appl security update (important) | ||
Description: | [1.0.1-2.1] - ftpd: add candidate patch to detect setegid/setregid/setresgid and check for errors when calling them (MITKRB5-SA-2011-005, CVE-2011-1526, #713341) | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2011-0920 CVE-2011-1526 | Version: | 4 |
Platform(s): | Oracle Linux 6 | Product(s): | krb5-appl |
Definition Synopsis: | |||
CPE : Common Platform Enumeration
Type | Description | Count |
---|---|---|
Application | 1 | |
Os | 2 | |
Os | 2 | |
Os | 2 | |
Os | 2 | |
Os | 5 | |
Os | 2 |
OpenVAS Exploits
Date | Description |
---|---|
2012-08-02 | Name : SuSE Update for krb5-appl openSUSE-SU-2012:0019-1 (krb5-appl) File : nvt/gb_suse_2012_0019_1.nasl |
2012-08-02 | Name : SuSE Update for krb5-appl openSUSE-SU-2012:0051-1 (krb5-appl) File : nvt/gb_suse_2012_0051_1.nasl |
2012-06-06 | Name : RedHat Update for krb5-appl RHSA-2011:0920-01 File : nvt/gb_RHSA-2011_0920-01_krb5-appl.nasl |
2012-02-21 | Name : RedHat Update for krb5 RHSA-2012:0306-03 File : nvt/gb_RHSA-2012_0306-03_krb5.nasl |
2012-02-12 | Name : Gentoo Security Advisory GLSA 201201-14 (mit-krb5-appl) File : nvt/glsa_201201_14.nasl |
2012-01-09 | Name : Fedora Update for krb5-appl FEDORA-2011-17492 File : nvt/gb_fedora_2011_17492_krb5-appl_fc15.nasl |
2011-08-07 | Name : Debian Security Advisory DSA 2283-1 (krb5-appl) File : nvt/deb_2283_1.nasl |
2011-07-27 | Name : Mandriva Update for krb5-appl MDVSA-2011:117 (krb5-appl) File : nvt/gb_mandriva_MDVSA_2011_117.nasl |
2011-07-18 | Name : Fedora Update for krb5-appl FEDORA-2011-9080 File : nvt/gb_fedora_2011_9080_krb5-appl_fc15.nasl |
2011-07-18 | Name : Fedora Update for krb5-appl FEDORA-2011-9109 File : nvt/gb_fedora_2011_9109_krb5-appl_fc14.nasl |
Open Source Vulnerability Database (OSVDB)
Id | Description |
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73617 | Kerberos Applications GSS-API FTP Daemon EGID Privilege Matching Restriction ... |
Information Assurance Vulnerability Management (IAVM)
Date | Description |
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2011-07-07 | IAVM : 2011-B-0077 - MIT Kerberos Remote Privilege Escalation Vulnerability Severity : Category II - VMSKEY : V0029345 |
Nessus® Vulnerability Scanner
Date | Description |
---|---|
2014-11-17 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2012-0168.nasl - Type : ACT_GATHER_INFO |
2014-06-13 | Name : The remote openSUSE host is missing a security update. File : suse_11_4_krb5-appl-111229.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 |
2014-06-13 | Name : The remote openSUSE host is missing a security update. File : suse_11_3_krb5-appl-111229.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 |
2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2011-0920.nasl - Type : ACT_GATHER_INFO |
2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2012-0306.nasl - Type : ACT_GATHER_INFO |
2012-08-01 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20110705_krb5_appl_on_SL6_x.nasl - Type : ACT_GATHER_INFO |
2012-08-01 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20120221_krb5_on_SL5_x.nasl - Type : ACT_GATHER_INFO |
2012-02-21 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2012-0306.nasl - Type : ACT_GATHER_INFO |
2012-01-24 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201201-14.nasl - Type : ACT_GATHER_INFO |
2012-01-03 | Name : The remote SuSE 11 host is missing one or more security updates. File : suse_11_krb5-111229.nasl - Type : ACT_GATHER_INFO |
2012-01-03 | Name : The remote SuSE 10 host is missing a security-related patch. File : suse_krb5-7899.nasl - Type : ACT_GATHER_INFO |
2011-07-26 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-2283.nasl - Type : ACT_GATHER_INFO |
2011-07-25 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2011-117.nasl - Type : ACT_GATHER_INFO |
2011-07-15 | Name : The remote Fedora host is missing a security update. File : fedora_2011-9109.nasl - Type : ACT_GATHER_INFO |
2011-07-15 | Name : The remote Fedora host is missing a security update. File : fedora_2011-9080.nasl - Type : ACT_GATHER_INFO |
2011-07-06 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2011-0920.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2014-02-17 11:55:42 |
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