Executive Summary
Summary | |
---|---|
Title | krb5 security update |
Informations | |||
---|---|---|---|
Name | RHSA-2015:0794 | First vendor Publication | 2015-04-09 |
Vendor | RedHat | Last vendor Modification | 2015-04-09 |
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:S/C:C/I:C/A:C) | |||
---|---|---|---|
Cvss Base Score | 9 | Attack Range | Network |
Cvss Impact Score | 10 | 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 multiple security issues are now available for Red Hat Enterprise Linux 6. Red Hat Product Security 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 networked authentication system which allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos KDC. The following security issues are fixed with this release: A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library (libgssapi) could call the gss_process_context_token() function and use this flaw to crash that application. (CVE-2014-5352) If kadmind were used with an LDAP back end for the KDC database, a remote, authenticated attacker who has the permissions to set the password policy could crash kadmind by attempting to use a named ticket policy object as a password policy for a principal. (CVE-2014-5353) It was found that the krb5_read_message() function of MIT Kerberos did not correctly sanitize input, and could create invalid krb5_data objects. A remote, unauthenticated attacker could use this flaw to crash a Kerberos child process via a specially crafted request. (CVE-2014-5355) A double-free flaw was found in the way MIT Kerberos handled invalid External Data Representation (XDR) data. An authenticated user could use this flaw to crash the MIT Kerberos administration server (kadmind), or other applications using Kerberos libraries, via specially crafted XDR packets. (CVE-2014-9421) It was found that the MIT Kerberos administration server (kadmind) incorrectly accepted certain authentication requests for two-component server principal names. A remote attacker able to acquire a key with a particularly named principal (such as "kad/x") could use this flaw to impersonate any user to kadmind, and perform administrative actions as that user. (CVE-2014-9422) Red Hat would like to thank the MIT Kerberos project for reporting CVE-2014-5352, CVE-2014-9421, and CVE-2014-9422. The MIT Kerberos project acknowledges Nico Williams for assisting with the analysis of CVE-2014-5352. All krb5 users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1174543 - CVE-2014-5353 krb5: NULL pointer dereference when using a ticket policy name as a password policy name 1179856 - CVE-2014-5352 krb5: gss_process_context_token() incorrectly frees context (MITKRB5-SA-2015-001) 1179857 - CVE-2014-9421 krb5: kadmind doubly frees partial deserialization results (MITKRB5-SA-2015-001) 1179861 - CVE-2014-9422 krb5: kadmind incorrectly validates server principal name (MITKRB5-SA-2015-001) 1193939 - CVE-2014-5355 krb5: unauthenticated denial of service in recvauth_common() and others |
Original Source
Url : https://rhn.redhat.com/errata/RHSA-2015-0794.html |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
50 % | CWE-476 | NULL Pointer Dereference |
50 % | CWE-284 | Access Control (Authorization) Issues |
OVAL Definitions
Definition Id: oval:org.mitre.oval:def:28572 | |||
Oval ID: | oval:org.mitre.oval:def:28572 | ||
Title: | AIX NAS Denial of Service via malformed XDR data | ||
Description: | The auth_gssapi_unwrap_data function in lib/rpc/auth_gssapi_misc.c in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly handle partial XDR deserialization, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via malformed XDR data, as demonstrated by data sent to kadmind. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2014-9421 | Version: | 4 |
Platform(s): | IBM AIX 6.1 IBM AIX 7.1 | Product(s): | |
Definition Synopsis: | |||
|
Definition Id: oval:org.mitre.oval:def:28597 | |||
Oval ID: | oval:org.mitre.oval:def:28597 | ||
Title: | AIX NAS allows remote users to obtain administrative access by leveraging access to a two-component principal | ||
Description: | The check_rpcsec_auth function in kadmin/server/kadm_rpc_svc.c in kadmind in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 allows remote authenticated users to bypass a kadmin/* authorization check and obtain administrative access by leveraging access to a two-component principal with an initial "kadmind" substring, as demonstrated by a "ka/x" principal. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2014-9422 | Version: | 4 |
Platform(s): | IBM AIX 6.1 IBM AIX 7.1 | Product(s): | |
Definition Synopsis: | |||
|
Definition Id: oval:org.mitre.oval:def:28832 | |||
Oval ID: | oval:org.mitre.oval:def:28832 | ||
Title: | AIX NAS Denial of Service via a zero-byte version string or by omitting the '\0' character | ||
Description: | MIT Kerberos 5 (aka krb5) through 1.13.1 incorrectly expects that a krb5_read_message data field is represented as a string ending with a '\0' character, which allows remote attackers to (1) cause a denial of service (NULL pointer dereference) via a zero-byte version string or (2) cause a denial of service (out-of-bounds read) by omitting the '\0' character, related to appl/user_user/server.c and lib/krb5/krb/recvauth.c. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2014-5355 | Version: | 4 |
Platform(s): | IBM AIX 6.1 IBM AIX 7.1 | Product(s): | |
Definition Synopsis: | |||
|
Definition Id: oval:org.mitre.oval:def:29035 | |||
Oval ID: | oval:org.mitre.oval:def:29035 | ||
Title: | AIX NAS denial of service vulnerability | ||
Description: | The krb5_gss_process_context_token function in lib/gssapi/krb5/process_context_token.c in the libgssapi_krb5 library in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly maintain security-context handles, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via crafted GSSAPI traffic, as demonstrated by traffic to kadmind. | ||
Family: | unix | Class: | vulnerability |
Reference(s): | CVE-2014-5352 | Version: | 4 |
Platform(s): | IBM AIX 6.1 IBM AIX 7.1 | Product(s): | |
Definition Synopsis: | |||
|
CPE : Common Platform Enumeration
Information Assurance Vulnerability Management (IAVM)
Date | Description |
---|---|
2015-05-28 | IAVM : 2015-B-0069 - Multiple Vulnerabilities in MIT Kerberos 5 Severity : Category I - VMSKEY : V0060811 |
Snort® IPS/IDS
Date | Description |
---|---|
2020-01-07 | MIT Kerberos 5 krb5_read_message ksh protocol bad sendauth version length den... RuleID : 52392 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message ksh protocol bad sendauth version length den... RuleID : 52391 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message klogin ksh kprop protocols bad app version s... RuleID : 52390 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message klogin ksh kprop protocols bad app version s... RuleID : 52389 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message klogin ksh kprop protocols bad sendauth vers... RuleID : 52388 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message kprop protocol bad sendauth version length d... RuleID : 52387 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message klogin ksh kprop protocols bad app version l... RuleID : 52386 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message klogin protocol bad sendauth or app version ... RuleID : 52385 - Revision : 1 - Type : SERVER-OTHER |
2020-01-07 | MIT Kerberos 5 krb5_read_message klogin ksh kprop protocols bad sendauth vers... RuleID : 52384 - Revision : 1 - Type : SERVER-OTHER |
2015-07-08 | MIT Kerberos 5 krb5_read_message denial of service attempt RuleID : 34709 - Revision : 4 - Type : SERVER-OTHER |
Nessus® Vulnerability Scanner
Date | Description |
---|---|
2018-02-01 | Name : The remote Debian host is missing a security update. File : debian_DLA-1265.nasl - Type : ACT_GATHER_INFO |
2016-03-24 | Name : The remote OracleVM host is missing a security update. File : oraclevm_OVMSA-2016-0039.nasl - Type : ACT_GATHER_INFO |
2015-12-22 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20151119_krb5_on_SL7_x.nasl - Type : ACT_GATHER_INFO |
2015-12-15 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2015-624.nasl - Type : ACT_GATHER_INFO |
2015-12-02 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2015-2154.nasl - Type : ACT_GATHER_INFO |
2015-11-24 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2015-2154.nasl - Type : ACT_GATHER_INFO |
2015-11-19 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2015-2154.nasl - Type : ACT_GATHER_INFO |
2015-11-13 | Name : The remote Ubuntu host is missing one or more security-related patches. File : ubuntu_USN-2810-1.nasl - Type : ACT_GATHER_INFO |
2015-07-24 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-1282-1.nasl - Type : ACT_GATHER_INFO |
2015-07-22 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-1276-1.nasl - Type : ACT_GATHER_INFO |
2015-06-22 | Name : The remote Fedora host is missing a security update. File : fedora_2015-7878.nasl - Type : ACT_GATHER_INFO |
2015-05-28 | Name : The remote AIX host has a version of NAS installed that is affected by multip... File : aix_nas_advisory3.nasl - Type : ACT_GATHER_INFO |
2015-05-20 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-0290-2.nasl - Type : ACT_GATHER_INFO |
2015-05-20 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2015-0290-1.nasl - Type : ACT_GATHER_INFO |
2015-05-07 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2015-518.nasl - Type : ACT_GATHER_INFO |
2015-04-23 | Name : The remote Fedora host is missing a security update. File : fedora_2015-5949.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2015-0794.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20150409_krb5_on_SL6_x.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote OracleVM host is missing a security update. File : oraclevm_OVMSA-2015-0054.nasl - Type : ACT_GATHER_INFO |
2015-04-10 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2015-0794.nasl - Type : ACT_GATHER_INFO |
2015-04-09 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2015-0794.nasl - Type : ACT_GATHER_INFO |
2015-03-30 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2015-069.nasl - Type : ACT_GATHER_INFO |
2015-03-26 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20150305_krb5_on_SL7_x.nasl - Type : ACT_GATHER_INFO |
2015-03-26 | Name : The remote Debian host is missing a security update. File : debian_DLA-146.nasl - Type : ACT_GATHER_INFO |
2015-03-20 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2015-246.nasl - Type : ACT_GATHER_INFO |
2015-03-18 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2015-0439.nasl - Type : ACT_GATHER_INFO |
2015-03-13 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2015-0439.nasl - Type : ACT_GATHER_INFO |
2015-03-13 | Name : The remote Fedora host is missing a security update. File : fedora_2015-2347.nasl - Type : ACT_GATHER_INFO |
2015-03-10 | Name : The remote Fedora host is missing a security update. File : fedora_2015-2382.nasl - Type : ACT_GATHER_INFO |
2015-03-05 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2015-0439.nasl - Type : ACT_GATHER_INFO |
2015-02-26 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_dbf9e66cbd5011e4a7ba206a8a720317.nasl - Type : ACT_GATHER_INFO |
2015-02-23 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_63527d0db9de11e48a48206a8a720317.nasl - Type : ACT_GATHER_INFO |
2015-02-13 | Name : The remote FreeBSD host is missing one or more security-related updates. File : freebsd_pkg_3a888a1eb32111e483b2206a8a720317.nasl - Type : ACT_GATHER_INFO |
2015-02-12 | Name : The remote SuSE 11 host is missing one or more security updates. File : suse_11_krb5-20150206-150206.nasl - Type : ACT_GATHER_INFO |
2015-02-12 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2015-128.nasl - Type : ACT_GATHER_INFO |
2015-02-11 | Name : The remote Ubuntu host is missing one or more security-related patches. File : ubuntu_USN-2498-1.nasl - Type : ACT_GATHER_INFO |
2015-02-05 | Name : The remote FreeBSD host is missing one or more security-related updates. File : freebsd_pkg_24ce5597acab11e4a847206a8a720317.nasl - Type : ACT_GATHER_INFO |
2015-02-04 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-3153.nasl - Type : ACT_GATHER_INFO |
2015-01-09 | Name : The remote Mandriva Linux host is missing one or more security updates. File : mandriva_MDVSA-2015-009.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
---|---|
2015-12-05 13:27:56 |
|
2015-05-08 13:27:57 |
|
2015-04-11 13:29:18 |
|
2015-04-10 13:28:14 |
|
2015-04-09 09:26:25 |
|