Test ID:	1.3.6.1.4.1.25623.1.0.844593
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory for samba (USN-4510-1)
Summary:	The remote host is missing an update for the 'samba'; package(s) announced via the USN-4510-1 advisory.
Description:	Summary: The remote host is missing an update for the 'samba' package(s) announced via the USN-4510-1 advisory. Vulnerability Insight: Tom Tervoort discovered that the Netlogon protocol implemented by Samba incorrectly handled the authentication scheme. A remote attacker could use this issue to forge an authentication token and steal the credentials of the domain admin. This update fixes the issue by changing the 'server schannel' setting to default to 'yes', instead of 'auto', which will force a secure netlogon channel. This may result in compatibility issues with older devices. A future update may allow a finer-grained control over this setting. Affected Software/OS: 'samba' package(s) on Ubuntu 18.04 LTS, Ubuntu 16.04 LTS. Solution: Please install the updated package(s). CVSS Score: 9.3 CVSS Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2020-1472 CERT/CC vulnerability note: VU#490028 https://www.kb.cert.org/vuls/id/490028 https://www.synology.com/security/advisory/Synology_SA_20_21 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/H4OTFBL6YDVFH2TBJFJIE4FMHPJEEJK3/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TAPQQZZAT4TG3XVRTAFV2Y3S7OAHFBUP/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ST6X3A2XXYMGD4INR26DQ4FP4QSM753B/ https://security.gentoo.org/glsa/202012-24 http://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.html http://packetstormsecurity.com/files/160127/Zerologon-Netlogon-Privilege-Escalation.html https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472 https://www.oracle.com/security-alerts/cpuApr2021.html https://lists.debian.org/debian-lts-announce/2020/11/msg00041.html http://www.openwall.com/lists/oss-security/2020/09/17/2 SuSE Security Announcement: openSUSE-SU-2020:1513 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00080.html SuSE Security Announcement: openSUSE-SU-2020:1526 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00086.html https://usn.ubuntu.com/4510-1/ https://usn.ubuntu.com/4510-2/ https://usn.ubuntu.com/4559-1/
Copyright	Copyright (C) 2020 Greenbone Networks GmbH

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