ID CVE-2013-0287
Summary The Simple Access Provider in System Security Services Daemon (SSSD) 1.9.0 through 1.9.4, when the Active Directory provider is used, does not properly enforce the simple_deny_groups option, which allows remote authenticated users to bypass intended access restrictions.
References
Vulnerable Configurations
  • Fedora SSSD - System Security Services Daemon 1.9.0
    cpe:2.3:a:fedoraproject:sssd:1.9.0
  • Fedora SSSD - System Security Services Daemon 1.9.1
    cpe:2.3:a:fedoraproject:sssd:1.9.1
  • Fedora SSSD - System Security Services Daemon 1.9.2
    cpe:2.3:a:fedoraproject:sssd:1.9.2
  • Fedora SSSD - System Security Services Daemon 1.9.3
    cpe:2.3:a:fedoraproject:sssd:1.9.3
  • Fedora SSSD - System Security Services Daemon 1.9.4
    cpe:2.3:a:fedoraproject:sssd:1.9.4
CVSS
Base: 4.9 (as of 22-03-2013 - 10:24)
Impact:
Exploitability:
CWE CWE-264
CAPEC
  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Access
VectorComplexityAuthentication
NETWORK MEDIUM SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL NONE
nessus via4
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2013-0663.NASL
    description Updated sssd packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 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. SSSD (System Security Services Daemon) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides NSS (Name Service Switch) and PAM (Pluggable Authentication Modules) interfaces toward the system and a pluggable back end system to connect to multiple different account sources. When SSSD was configured as a Microsoft Active Directory client by using the new Active Directory provider (introduced in RHSA-2013:0508), the Simple Access Provider ('access_provider = simple' in '/etc/sssd/sssd.conf') did not handle access control correctly. If any groups were specified with the 'simple_deny_groups' option (in sssd.conf), all users were permitted access. (CVE-2013-0287) The CVE-2013-0287 issue was discovered by Kaushik Banerjee of Red Hat. This update also fixes the following bugs : * If a group contained a member whose Distinguished Name (DN) pointed out of any of the configured search bases, the search request that was processing this particular group never ran to completion. To the user, this bug manifested as a long timeout between requesting the group data and receiving the result. A patch has been provided to address this bug and SSSD now processes group search requests without delays. (BZ#907362) * The pwd_expiration_warning should have been set for seven days, but instead it was set to zero for Kerberos. This incorrect zero setting returned the 'always display warning if the server sends one' error message and users experienced problems in environments like IPA or Active Directory. Currently, the value setting for Kerberos is modified and this issue no longer occurs. (BZ#914671) All users of sssd are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 65634
    published 2013-03-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=65634
    title CentOS 6 : sssd (CESA-2013:0663)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20130319_SSSD_ON_SL6_X.NASL
    description When SSSD was configured as a Microsoft Active Directory client by using the new Active Directory provider (introduced in SLSA-2013:0508), the Simple Access Provider ('access_provider = simple' in '/etc/sssd/sssd.conf') did not handle access control correctly. If any groups were specified with the 'simple_deny_groups' option (in sssd.conf), all users were permitted access. (CVE-2013-0287) This update also fixes the following bugs : - If a group contained a member whose Distinguished Name (DN) pointed out of any of the configured search bases, the search request that was processing this particular group never ran to completion. To the user, this bug manifested as a long timeout between requesting the group data and receiving the result. A patch has been provided to address this bug and SSSD now processes group search requests without delays. - The pwd_expiration_warning should have been set for seven days, but instead it was set to zero for Kerberos. This incorrect zero setting returned the 'always display warning if the server sends one' error message and users experienced problems in environments like IPA or Active Directory. Currently, the value setting for Kerberos is modified and this issue no longer occurs.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 65627
    published 2013-03-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=65627
    title Scientific Linux Security Update : sssd on SL6.x i386/x86_64
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2013-0663.NASL
    description From Red Hat Security Advisory 2013:0663 : Updated sssd packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 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. SSSD (System Security Services Daemon) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides NSS (Name Service Switch) and PAM (Pluggable Authentication Modules) interfaces toward the system and a pluggable back end system to connect to multiple different account sources. When SSSD was configured as a Microsoft Active Directory client by using the new Active Directory provider (introduced in RHSA-2013:0508), the Simple Access Provider ('access_provider = simple' in '/etc/sssd/sssd.conf') did not handle access control correctly. If any groups were specified with the 'simple_deny_groups' option (in sssd.conf), all users were permitted access. (CVE-2013-0287) The CVE-2013-0287 issue was discovered by Kaushik Banerjee of Red Hat. This update also fixes the following bugs : * If a group contained a member whose Distinguished Name (DN) pointed out of any of the configured search bases, the search request that was processing this particular group never ran to completion. To the user, this bug manifested as a long timeout between requesting the group data and receiving the result. A patch has been provided to address this bug and SSSD now processes group search requests without delays. (BZ#907362) * The pwd_expiration_warning should have been set for seven days, but instead it was set to zero for Kerberos. This incorrect zero setting returned the 'always display warning if the server sends one' error message and users experienced problems in environments like IPA or Active Directory. Currently, the value setting for Kerberos is modified and this issue no longer occurs. (BZ#914671) All users of sssd are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
    last seen 2019-02-21
    modified 2018-08-13
    plugin id 68793
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68793
    title Oracle Linux 6 : sssd (ELSA-2013-0663)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2013-4193.NASL
    description Bug 923838 - CVE-2013-0287 sssd: simple access provider flaw prevents intended ACL use when client to an AD provider. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-05-09
    plugin id 65750
    published 2013-04-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=65750
    title Fedora 18 : sssd-1.9.4-7.fc18 (2013-4193)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2013-264.NASL
    description When SSSD is configured as an Active Directory client by using the new Active Directory provider or equivalent configuration of the LDAP provider, the Simple Access Provider does not handle access control correctly. If any groups are specified with the simple_deny_groups option, the group members are permitted access. (CVE-2013-0287)
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 74947
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=74947
    title openSUSE Security Update : sssd (openSUSE-SU-2013:0559-1)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2013-0663.NASL
    description Updated sssd packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 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. SSSD (System Security Services Daemon) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides NSS (Name Service Switch) and PAM (Pluggable Authentication Modules) interfaces toward the system and a pluggable back end system to connect to multiple different account sources. When SSSD was configured as a Microsoft Active Directory client by using the new Active Directory provider (introduced in RHSA-2013:0508), the Simple Access Provider ('access_provider = simple' in '/etc/sssd/sssd.conf') did not handle access control correctly. If any groups were specified with the 'simple_deny_groups' option (in sssd.conf), all users were permitted access. (CVE-2013-0287) The CVE-2013-0287 issue was discovered by Kaushik Banerjee of Red Hat. This update also fixes the following bugs : * If a group contained a member whose Distinguished Name (DN) pointed out of any of the configured search bases, the search request that was processing this particular group never ran to completion. To the user, this bug manifested as a long timeout between requesting the group data and receiving the result. A patch has been provided to address this bug and SSSD now processes group search requests without delays. (BZ#907362) * The pwd_expiration_warning should have been set for seven days, but instead it was set to zero for Kerberos. This incorrect zero setting returned the 'always display warning if the server sends one' error message and users experienced problems in environments like IPA or Active Directory. Currently, the value setting for Kerberos is modified and this issue no longer occurs. (BZ#914671) All users of sssd are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
    last seen 2019-02-21
    modified 2018-12-20
    plugin id 65626
    published 2013-03-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=65626
    title RHEL 6 : sssd (RHSA-2013:0663)
redhat via4
advisories
bugzilla
id 914671
title pwd_expiration_warning has wrong default for Kerberos
oval
AND
  • OR
    • comment Red Hat Enterprise Linux 6 Client is installed
      oval oval:com.redhat.rhsa:tst:20100842001
    • comment Red Hat Enterprise Linux 6 Server is installed
      oval oval:com.redhat.rhsa:tst:20100842002
    • comment Red Hat Enterprise Linux 6 Workstation is installed
      oval oval:com.redhat.rhsa:tst:20100842003
    • comment Red Hat Enterprise Linux 6 ComputeNode is installed
      oval oval:com.redhat.rhsa:tst:20100842004
  • OR
    • AND
      • comment libipa_hbac is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663025
      • comment libipa_hbac is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508020
    • AND
      • comment libipa_hbac-devel is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663021
      • comment libipa_hbac-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508026
    • AND
      • comment libipa_hbac-python is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663009
      • comment libipa_hbac-python is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508012
    • AND
      • comment libsss_autofs is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663011
      • comment libsss_autofs is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508008
    • AND
      • comment libsss_idmap is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663019
      • comment libsss_idmap is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508018
    • AND
      • comment libsss_idmap-devel is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663013
      • comment libsss_idmap-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508010
    • AND
      • comment libsss_sudo is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663007
      • comment libsss_sudo is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508016
    • AND
      • comment libsss_sudo-devel is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663023
      • comment libsss_sudo-devel is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20130508024
    • AND
      • comment sssd is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663005
      • comment sssd is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20110560006
    • AND
      • comment sssd-client is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663017
      • comment sssd-client is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20110560008
    • AND
      • comment sssd-tools is earlier than 0:1.9.2-82.4.el6_4
        oval oval:com.redhat.rhsa:tst:20130663015
      • comment sssd-tools is signed with Red Hat redhatrelease2 key
        oval oval:com.redhat.rhsa:tst:20110560010
rhsa
id RHSA-2013:0663
released 2013-03-19
severity Moderate
title RHSA-2013:0663: sssd security and bug fix update (Moderate)
rpms
  • libipa_hbac-0:1.9.2-82.4.el6_4
  • libipa_hbac-devel-0:1.9.2-82.4.el6_4
  • libipa_hbac-python-0:1.9.2-82.4.el6_4
  • libsss_autofs-0:1.9.2-82.4.el6_4
  • libsss_idmap-0:1.9.2-82.4.el6_4
  • libsss_idmap-devel-0:1.9.2-82.4.el6_4
  • libsss_sudo-0:1.9.2-82.4.el6_4
  • libsss_sudo-devel-0:1.9.2-82.4.el6_4
  • sssd-0:1.9.2-82.4.el6_4
  • sssd-client-0:1.9.2-82.4.el6_4
  • sssd-tools-0:1.9.2-82.4.el6_4
refmap via4
bid 58593
confirm
misc http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=910938
mlist [sssd-devel] 20130319 [SSSD] A security bug in SSSD 1.9 (CVE-2013-0287)
sectrack 1028317
secunia
  • 52704
  • 52722
suse openSUSE-SU-2013:0559
Last major update 14-05-2013 - 23:34
Published 21-03-2013 - 12:55
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