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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.3071 sssd security update 30 May 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: sssd Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2022-4254 CVE-2021-3621 CVE-2019-3811 CVE-2018-16838 Original Bulletin: https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html Comment: CVSS (Max): 8.8 CVE-2022-4254 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: NVD Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3436-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Guilhem Moulin May 29, 2023 https://wiki.debian.org/LTS - ------------------------------------------------------------------------- Package : sssd Version : 1.16.3-3.2+deb10u1 CVE ID : CVE-2018-16838 CVE-2019-3811 CVE-2021-3621 CVE-2022-4254 Debian Bug : 919051 931432 992710 Multiple vulnerabilities were found in sssd, a set of daemons to manage access to remote directories and authentication mechanisms, which could lead to privilege escalation. CVE-2018-16838 It was discovered that when the Group Policy Objects (GPO) are not readable by SSSD due to a too strict permission settings on the server side, SSSD allows all authenticated users to login instead of denying access. A new boolean setting (defaulting to False) is introduced for environments where attributes in the groupPolicyContainer are not readable and changing the permissions on the GPO objects is not possible or desirable. See sssd-ad(5). CVE-2019-3811 It was discovered that if a user was configured with no home directory set, then sssd(8) returns (i.e., the root directory) instead of the empty string (meaning no home directory). This could impact services that restrict the user's filesystem access to within their home directory through chroot() or similar. CVE-2021-3621 It was discovered that the sssctl(8) command was vulnerable to shell command injection via the subcommands. This flaw could allows an attacker to trick the root user into running a specially crafted sssctl(8) command, such as via sudo, in order to gain root privileges. CVE-2022-4254 It was discovered that libsss_certmap failed to sanitize certificate data used in LDAP filters. PKINIT enables a client to authenticate to the KDC using an X.509 certificate and the corresponding private key, rather than a passphrase or keytab. Mapping rules are used in order to map the certificate presented during a PKINIT authentication request to the corresponding principal. However the mapping filter was found to be vulnerable to LDAP filter injection. As the search result is be influenced by values in the certificate, which may be attacker controlled, this flaw could allow an attacker to gain control of the admin account, leading to full domain takeover. For Debian 10 buster, these problems have been fixed in version 1.16.3-3.2+deb10u1. We recommend that you upgrade your sssd packages. For the detailed security status of sssd please refer to its security tracker page at: https://security-tracker.debian.org/tracker/sssd Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEERpy6p3b9sfzUdbME05pJnDwhpVIFAmR0rBcACgkQ05pJnDwh pVL+Xw//YEW3PRadnAhjhXDPIyVqDaEal6sZWX+D30NDfagg7/ISMSz5XyKlXS1H 2NwKR8T5xckNsuI2YIds+TCKTJvqLr5JkOO9B6AufLi9zKJMulIWSt56KRBb2TKq rSZQPJPl6h/lJfj7t1mjHqIR7XXXfUXqCeD8zZChrwxXS0nQDLGpYYH3eKDIHKG9 VmaPXegmDqAFqKu6M4fMoFDBn+EJ5cFHnJ4qIOXhskd/8sv9hm+JF+5bAIu3K5S2 8qwcjx70UCwhy8I2iXsSaBRwcNgw4Ir/EfPIzUcvKLmCmD2Ww+hnFuvqiOhpSOqK Zq0godlvq/yTpcVYFwKb1sEu9aprTADJbp+8c3avZNU68DXh4RhkbW2qPFVL0Qmg B3IpoUiGOp2W3CdhUpiIjJk2WIinoc1YJfhUtHLV9JvCUlxgfNdCISd6buNk7Bnk w9JyX5ueGNpUxpxiKoRdd06ujFNXkNAddzV9ZNQsnJ6vUYofQ5eoLzUz92o+TYv0 0aFoUW48sgIUzFZDzpEycXvM0La5XBC+ZMIANmei3AEnUi2MaaOQvjI1pyZz8nuT TimaEMoLh9jcJ6/cjc9xnhKi4zqbduwzMSkxfBWUH14ZgHmX7YpNEZIeuTOn7nfg 4LhuSUgGJNczV0GIe2LwlfTvlprXmpfsd52JpzUMXYd96qbEDMw= =x5Zd - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBZHVmn8kNZI30y1K9AQiCRxAAsQ7770hnTI3Fe2nrM6mvDWT0wBZKNOC0 qFVREaf961Q5DpQSKFWPrGKGu8sBV162dZJmBXwArNzTATcmjgXVflTR1+jMIivP WHBRgEvJAsfpCxFwSb2SCUvmCNckQP94+VVlie52ADUo5d3mC0RkBWDvlidcSw5s rd0GT3k1iyQAf858BOB80ZQs0Rt/P3tPqK/3AlxPlJLUR3s/1Y4A3fTtCm9kweKD nwIgbfgdA3EOWECevcrayeYmWlTMGZPW+HMwwtZT+wBk9qgT01doXUQ+zro+P6Hv dcNIGDzBaoJQnzk28SGUlx7zSmmMDVdBaju5n9HOGp3OxhLWEGbISkOaQB8Lx3Ki eE//h3jjbE8p8O0Ql2+gSTfX1GBZGawFPwgQAbIysFGGoQ5WqBR24uH9A+jyfX67 I3dxTq4jYHuo026jXoPnkQZz5XlxhJ2UfluNB2hIWI+T73fSKVHFABeX/ukLtPne kE0vYYBMwBzntWhoIoUInT79ZGMxBo1vIiF3WE3r5WSuITHBP2yRDB4AV2CsW5Ap MZfhTik+fCzPSqvSHeWPbbHPEQMKHnrHBz4oQFvmNxOVC3WWI52H4uD+z3Mvc3RQ kUSf0Vl5LkZgXjkeyv1flY5pVGZaq1fMEmedjeGGA8JaDQSMdCbIlRhHcIjKUDlo gq6+pT5++cI= =1QuI -----END PGP SIGNATURE-----