ID CVE-2018-16838
Summary A flaw was found in sssd Group Policy Objects implementation. When the GPO is not readable by SSSD due to a too strict permission settings on the server side, SSSD will allow all authenticated users to login instead of denying access.
References
Vulnerable Configurations
  • cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*
    cpe:2.3:a:fedoraproject:sssd:-:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
CVSS
Base: 5.5 (as of 15-10-2020 - 13:28)
Impact:
Exploitability:
CWE CWE-269
CAPEC
  • Privilege Escalation
    An adversary exploits a weakness enabling them to elevate their privilege and perform an action that they are not supposed to be authorized to perform.
  • Privilege Abuse
    An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.
  • 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.
Access
VectorComplexityAuthentication
NETWORK LOW SINGLE
Impact
ConfidentialityIntegrityAvailability
PARTIAL PARTIAL NONE
cvss-vector via4 AV:N/AC:L/Au:S/C:P/I:P/A:N
redhat via4
advisories
  • bugzilla
    id 1736861
    title dyndns_update = True is no longer enough to get the IP address of the machine updated in IPA upon sssd.service startup
    oval
    OR
    • comment Red Hat Enterprise Linux must be installed
      oval oval:com.redhat.rhba:tst:20070304026
    • AND
      • comment Red Hat Enterprise Linux 8 is installed
        oval oval:com.redhat.rhba:tst:20193384074
      • OR
        • AND
          • comment libipa_hbac is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651001
          • comment libipa_hbac is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375002
        • AND
          • comment libsss_autofs is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651003
          • comment libsss_autofs is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20130508008
        • AND
          • comment libsss_certmap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651005
          • comment libsss_certmap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20173379008
        • AND
          • comment libsss_idmap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651007
          • comment libsss_idmap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375008
        • AND
          • comment libsss_nss_idmap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651009
          • comment libsss_nss_idmap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375012
        • AND
          • comment libsss_nss_idmap-devel is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651011
          • comment libsss_nss_idmap-devel is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375014
        • AND
          • comment libsss_simpleifp is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651013
          • comment libsss_simpleifp is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20150441018
        • AND
          • comment libsss_sudo is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651015
          • comment libsss_sudo is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20130508014
        • AND
          • comment python3-libipa_hbac is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651017
          • comment python3-libipa_hbac is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651018
        • AND
          • comment python3-libsss_nss_idmap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651019
          • comment python3-libsss_nss_idmap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651020
        • AND
          • comment python3-sss is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651021
          • comment python3-sss is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651022
        • AND
          • comment python3-sss-murmur is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651023
          • comment python3-sss-murmur is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651024
        • AND
          • comment python3-sssdconfig is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651025
          • comment python3-sssdconfig is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651026
        • AND
          • comment sssd is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651027
          • comment sssd is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375020
        • AND
          • comment sssd-ad is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651029
          • comment sssd-ad is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375022
        • AND
          • comment sssd-client is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651031
          • comment sssd-client is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375024
        • AND
          • comment sssd-common is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651033
          • comment sssd-common is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375026
        • AND
          • comment sssd-common-pac is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651035
          • comment sssd-common-pac is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375028
        • AND
          • comment sssd-dbus is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651037
          • comment sssd-dbus is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375030
        • AND
          • comment sssd-debugsource is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651039
          • comment sssd-debugsource is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651040
        • AND
          • comment sssd-ipa is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651041
          • comment sssd-ipa is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375032
        • AND
          • comment sssd-kcm is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651043
          • comment sssd-kcm is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20173379050
        • AND
          • comment sssd-krb5 is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651045
          • comment sssd-krb5 is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375034
        • AND
          • comment sssd-krb5-common is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651047
          • comment sssd-krb5-common is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375036
        • AND
          • comment sssd-ldap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651049
          • comment sssd-ldap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375038
        • AND
          • comment sssd-libwbclient is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651051
          • comment sssd-libwbclient is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20150441044
        • AND
          • comment sssd-nfs-idmap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651053
          • comment sssd-nfs-idmap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20193651054
        • AND
          • comment sssd-polkit-rules is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651055
          • comment sssd-polkit-rules is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20173379062
        • AND
          • comment sssd-proxy is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651057
          • comment sssd-proxy is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375040
        • AND
          • comment sssd-tools is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651059
          • comment sssd-tools is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhba:tst:20141375042
        • AND
          • comment sssd-winbind-idmap is earlier than 0:2.2.0-19.el8
            oval oval:com.redhat.rhsa:tst:20193651061
          • comment sssd-winbind-idmap is signed with Red Hat redhatrelease2 key
            oval oval:com.redhat.rhsa:tst:20173379068
    rhsa
    id RHSA-2019:3651
    released 2019-11-05
    severity Low
    title RHSA-2019:3651: sssd security, bug fix, and enhancement update (Low)
  • rhsa
    id RHSA-2019:2177
  • rhsa
    id RHSA-2019:2437
rpms
  • libipa_hbac-0:1.16.4-21.el7
  • libipa_hbac-devel-0:1.16.4-21.el7
  • libsss_autofs-0:1.16.4-21.el7
  • libsss_certmap-0:1.16.4-21.el7
  • libsss_certmap-devel-0:1.16.4-21.el7
  • libsss_idmap-0:1.16.4-21.el7
  • libsss_idmap-devel-0:1.16.4-21.el7
  • libsss_nss_idmap-0:1.16.4-21.el7
  • libsss_nss_idmap-devel-0:1.16.4-21.el7
  • libsss_simpleifp-0:1.16.4-21.el7
  • libsss_simpleifp-devel-0:1.16.4-21.el7
  • libsss_sudo-0:1.16.4-21.el7
  • python-libipa_hbac-0:1.16.4-21.el7
  • python-libsss_nss_idmap-0:1.16.4-21.el7
  • python-sss-0:1.16.4-21.el7
  • python-sss-murmur-0:1.16.4-21.el7
  • python-sssdconfig-0:1.16.4-21.el7
  • sssd-0:1.16.4-21.el7
  • sssd-ad-0:1.16.4-21.el7
  • sssd-client-0:1.16.4-21.el7
  • sssd-common-0:1.16.4-21.el7
  • sssd-common-pac-0:1.16.4-21.el7
  • sssd-dbus-0:1.16.4-21.el7
  • sssd-debuginfo-0:1.16.4-21.el7
  • sssd-ipa-0:1.16.4-21.el7
  • sssd-kcm-0:1.16.4-21.el7
  • sssd-krb5-0:1.16.4-21.el7
  • sssd-krb5-common-0:1.16.4-21.el7
  • sssd-ldap-0:1.16.4-21.el7
  • sssd-libwbclient-0:1.16.4-21.el7
  • sssd-libwbclient-devel-0:1.16.4-21.el7
  • sssd-polkit-rules-0:1.16.4-21.el7
  • sssd-proxy-0:1.16.4-21.el7
  • sssd-tools-0:1.16.4-21.el7
  • sssd-winbind-idmap-0:1.16.4-21.el7
  • imgbased-0:1.1.9-0.1.el7ev
  • ovirt-node-ng-nodectl-0:4.3.5-0.20190717.0.el7ev
  • python-imgbased-0:1.1.9-0.1.el7ev
  • python2-ovirt-node-ng-nodectl-0:4.3.5-0.20190717.0.el7ev
  • redhat-release-virtualization-host-0:4.3.5-2.el7ev
  • redhat-virtualization-host-image-update-0:4.3.5-20190722.0.el7_7
  • redhat-virtualization-host-image-update-placeholder-0:4.3.5-2.el7ev
  • libipa_hbac-0:2.2.0-19.el8
  • libipa_hbac-debuginfo-0:2.2.0-19.el8
  • libsss_autofs-0:2.2.0-19.el8
  • libsss_autofs-debuginfo-0:2.2.0-19.el8
  • libsss_certmap-0:2.2.0-19.el8
  • libsss_certmap-debuginfo-0:2.2.0-19.el8
  • libsss_idmap-0:2.2.0-19.el8
  • libsss_idmap-debuginfo-0:2.2.0-19.el8
  • libsss_nss_idmap-0:2.2.0-19.el8
  • libsss_nss_idmap-debuginfo-0:2.2.0-19.el8
  • libsss_nss_idmap-devel-0:2.2.0-19.el8
  • libsss_simpleifp-0:2.2.0-19.el8
  • libsss_simpleifp-debuginfo-0:2.2.0-19.el8
  • libsss_sudo-0:2.2.0-19.el8
  • libsss_sudo-debuginfo-0:2.2.0-19.el8
  • python3-libipa_hbac-0:2.2.0-19.el8
  • python3-libipa_hbac-debuginfo-0:2.2.0-19.el8
  • python3-libsss_nss_idmap-0:2.2.0-19.el8
  • python3-libsss_nss_idmap-debuginfo-0:2.2.0-19.el8
  • python3-sss-0:2.2.0-19.el8
  • python3-sss-debuginfo-0:2.2.0-19.el8
  • python3-sss-murmur-0:2.2.0-19.el8
  • python3-sss-murmur-debuginfo-0:2.2.0-19.el8
  • python3-sssdconfig-0:2.2.0-19.el8
  • sssd-0:2.2.0-19.el8
  • sssd-ad-0:2.2.0-19.el8
  • sssd-ad-debuginfo-0:2.2.0-19.el8
  • sssd-client-0:2.2.0-19.el8
  • sssd-client-debuginfo-0:2.2.0-19.el8
  • sssd-common-0:2.2.0-19.el8
  • sssd-common-debuginfo-0:2.2.0-19.el8
  • sssd-common-pac-0:2.2.0-19.el8
  • sssd-common-pac-debuginfo-0:2.2.0-19.el8
  • sssd-dbus-0:2.2.0-19.el8
  • sssd-dbus-debuginfo-0:2.2.0-19.el8
  • sssd-debuginfo-0:2.2.0-19.el8
  • sssd-debugsource-0:2.2.0-19.el8
  • sssd-ipa-0:2.2.0-19.el8
  • sssd-ipa-debuginfo-0:2.2.0-19.el8
  • sssd-kcm-0:2.2.0-19.el8
  • sssd-kcm-debuginfo-0:2.2.0-19.el8
  • sssd-krb5-0:2.2.0-19.el8
  • sssd-krb5-common-0:2.2.0-19.el8
  • sssd-krb5-common-debuginfo-0:2.2.0-19.el8
  • sssd-krb5-debuginfo-0:2.2.0-19.el8
  • sssd-ldap-0:2.2.0-19.el8
  • sssd-ldap-debuginfo-0:2.2.0-19.el8
  • sssd-libwbclient-0:2.2.0-19.el8
  • sssd-libwbclient-debuginfo-0:2.2.0-19.el8
  • sssd-nfs-idmap-0:2.2.0-19.el8
  • sssd-nfs-idmap-debuginfo-0:2.2.0-19.el8
  • sssd-polkit-rules-0:2.2.0-19.el8
  • sssd-proxy-0:2.2.0-19.el8
  • sssd-proxy-debuginfo-0:2.2.0-19.el8
  • sssd-tools-0:2.2.0-19.el8
  • sssd-tools-debuginfo-0:2.2.0-19.el8
  • sssd-winbind-idmap-0:2.2.0-19.el8
  • sssd-winbind-idmap-debuginfo-0:2.2.0-19.el8
refmap via4
confirm https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16838
suse
  • openSUSE-SU-2019:1576
  • openSUSE-SU-2019:1589
Last major update 15-10-2020 - 13:28
Published 25-03-2019 - 18:29
Last modified 15-10-2020 - 13:28
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