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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.5254 samba security update 15 September 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: samba Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2019-19344 CVE-2019-14907 CVE-2019-14902 CVE-2019-14847 CVE-2019-14833 CVE-2019-10218 CVE-2016-2124 Original Bulletin: https://lists.debian.org/debian-lts-announce/2023/09/msg00013.html Comment: CVSS (Max): 6.5 CVE-2019-19344 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) CVSS Source: NIST Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3563-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Lee Garrett September 12, 2023 https://wiki.debian.org/LTS - - ------------------------------------------------------------------------- Package : samba Version : 2:4.9.5+dfsg-5+deb10u4 CVE ID : CVE-2016-2124 CVE-2019-10218 CVE-2019-14833 CVE-2019-14847 CVE-2019-14902 CVE-2019-14907 CVE-2019-19344 Debian Bug : Several vulnerabilities were discovered in Samba, the SMB/CIFS file, print, and login server for Unix. CVE-2016-2124 A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to retrieve the plaintext password sent over the wire even if Kerberos authentication was required. CVE-2019-10218 A flaw was found in the samba client, all samba versions before samba 4.11.2, 4.10.10 and 4.9.15, where a malicious server can supply a pathname to the client with separators. This could allow the client to access files and folders outside of the SMB network pathnames. An attacker could use this vulnerability to create files outside of the current working directory using the privileges of the client user. CVE-2019-14833 A flaw was found in Samba, all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2, in the way it handles a user password change or a new password for a samba user. The Samba Active Directory Domain Controller can be configured to use a custom script to check for password complexity. This configuration can fail to verify password complexity when non-ASCII characters are used in the password, which could lead to weak passwords being set for samba users, making it vulnerable to dictionary attacks. CVE-2019-14847 A flaw was found in samba 4.0.0 before samba 4.9.15 and samba 4.10.x before 4.10.10. An attacker can crash AD DC LDAP server via dirsync resulting in denial of service. Privilege escalation is not possible with this issue. CVE-2019-14902 There is an issue in all samba 4.11.x versions before 4.11.5, all samba 4.10.x versions before 4.10.12 and all samba 4.9.x versions before 4.9.18, where the removal of the right to create or modify a subtree would not automatically be taken away on all domain controllers. CVE-2019-14907 All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3" (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless). CVE-2019-19344 There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer. For Debian 10 buster, these problems have been fixed in version 2:4.9.5+dfsg-5+deb10u4. We recommend that you upgrade your samba packages. Admins of AD DC setups are reminded and strongly encouraged to upgrade to bullseye and then bookworm, as AD DC setups are unsupported in buster since [DSA 5015-1], and in bullseye since [DSA 5477-1]. [DSA 5015-1] https://www.debian.org/security/2021/dsa-5015 [DSA 5477-1] https://www.debian.org/security/2023/dsa-5477 For the detailed security status of samba please refer to its security tracker page at: https://security-tracker.debian.org/tracker/samba 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----- iQQzBAEBCgAdFiEE2EfGJRCpwv8kLOAs1gShxII+4PgFAmUDG/gACgkQ1gShxII+ 4PjigyAAhu0gVlUAHBoBwZiBv7qslHSbrfw7iD4Fc+MVrhf1wOiHnRcme8M1gd8w QDJe2hcGPSKm+Y45CH6/W7N/wRuHqH0iptEU1PrURyFyUJh7ypF+m87BlKOcNmyc by8NmUX1YyQMJAvf30zs/wGQh0+G02NBShQ2C1R9NSd5X47p1odXrwYzNCsSiYRo UA4KaEUQu08ewuvcgjQBjpvk5IIOlGk7sZDgfnDzPWyoLeDXOBw6ak1doIe2p6eJ 84v24dPq9H6j2xC86i8m6lnL5/zBzmV4Q/omFlTTD+ADevK06374RSfWu4XW3Nv1 i8dgGdSGar/L4MY77lJmEeCIaVC1B2QA3J/MPKGBVyld9NK4NFBlBF+AFJF8Awhb 1gK9o5IA3MsbY7dohI8+JGjWN1SaG/6Z4JHJoXQ36deY22OtHoplg4x43bwreg9g Pq5h1Spgi/bkSVNu14hVCVhQlvTJwkZW0msNp27OoKtq4zY75wM5ftAaZdscbaV0 4fr8R3d9YPxxbdLRbLvjcpcQt3uWb3mzWiMJ534sKKVeEvFlGbICxUyoxYzmYgQt tJnZJ9IgRn3rEE2zqTCQTzDANbfE17aEjHG/qU0WIUyyKVjKnRtntWU0LHdkn8kW iHjcv9S2eQWK947IHzAZqdSy17II8Ahq3RkoyGXV7fCgPz7/zdjLGhhhiDbCx+PE JXuc07bcVYmdDRBVui/CizmW7Q6m4/uAJ/nTB492uSQkgFzndutPFDmRMe20+FNI WsJJdcReg9+BgMOgWfIiHvTRXP7W/5enQWu8z25UsWujyYyTtWPHAfRhZc7HAXCg tUFxR6DLfaTda2qFSWI1M5DoKc/Dmphph/Ox+6p7ROczawaHYTMHw+n6jQGOCBA6 fG36A/Q42MHT6QEGW4E/pLwRQK64ia9zXkVbL7MqyK8LKvi9gOiF2Ne3NvU2EpYX EsbB30cIrJuH7v3remKoUhV8zBKwStGaZrChVWtB73HVdMOiZnQA/kjbz142DcAh BwNhtIl50ylhBg4KVmVyW9uq5X3CM0ZSELSY9y8cd4sXKW1W0LCxqrvdP3oVZ3C6 6BKlaMoqxqNxCrxXJmpwVnaqm1AUdSC43YFdnso290KHUvPI+lnPJ7qocL0qRPFH Gig56HqopCK4iEO8s6TUz4g1oXOZkjYIsY2MuacOQfNJJV7IKAbna3Ol6uC7fNgP HikA+RS7Tr0v/rSOgluMNtLAN8GnvJQqEPD4sDZT4oemgpWKVfa1wTKnP9M+FNLq wYzaJNCPgmyLM6wQIeywGJqv7eMsX8CcbahLC8WdkOyNUjj/bDCJ7Rxg2K6Z+/lK h9SdOH4G1fGq+VIhVSczMQN33dF2mg== =L50C - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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). 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