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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1707.2 USN-3976: Samba vulnerability 28 May 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: samba Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Provide Misleading Information -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-16860 Reference: ESB-2019.1702 Original Bulletin: https://usn.ubuntu.com/3976-1/ https://usn.ubuntu.com/3976-2/ Revision History: May 28 2019: USN-3976-1 introduced a regression in Samba May 15 2019: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- USN-3976-1: Samba vulnerability 14 May 2019 samba vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 19.04 o Ubuntu 18.10 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary Samba could allow unintended access to network services. Software Description o samba - SMB/CIFS file, print, and login server for Unix Details Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04 samba - 2:4.10.0+dfsg-0ubuntu2.1 Ubuntu 18.10 samba - 2:4.8.4+dfsg-2ubuntu2.4 Ubuntu 18.04 LTS samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.10 Ubuntu 16.04 LTS samba - 2:4.3.11+dfsg-0ubuntu0.16.04.20 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o CVE-2018-16860 - ----------------------------------------------------------------------------- USN-3976-2: Samba vulnerability 14 May 2019 samba vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 14.04 ESM o Ubuntu 12.04 ESM Summary Samba could allow unintended access to network services. Software Description o samba - SMB/CIFS file, print, and login server for Unix Details USN-3976-1 fixed a vulnerability in Samba. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM samba - 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm1 Ubuntu 12.04 ESM samba - 2:3.6.25-0ubuntu0.12.04.18 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o USN-3976-1 o CVE-2018-16860 - ----------------------------------------------------------------------------- USN-3976-3: Samba regression 27 May 2019 samba regression A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary USN-3976-1 introduced a regression in Samba. Software Description o samba - SMB/CIFS file, print, and login server for Unix Details USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression causing Samba to occasionally crash. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.11 Ubuntu 16.04 LTS samba - 2:4.3.11+dfsg-0ubuntu0.16.04.21 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o USN-3976-1 o LP: 1827924 - ----------------------------------------------------------------------------- USN-3976-4: Samba vulnerability 27 May 2019 samba vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 14.04 ESM Summary USN-3976-1 introduced a regression in Samba. Software Description o samba - SMB/CIFS file, print, and login server for Unix Details USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression causing Samba to occasionally crash. This update fixes the problem. Original advisory details: Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM samba - 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm2 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o USN-3976-1 o LP: 1827924 - --------------------------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. 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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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