The "ldap server require strong auth" option defines whether the The security advisory patch for this flaw introduces a new smb.conf option: ldap server require strong auth (G) This flaw affects all possible roles Samba can operate in. A man-in-the-middle attacker could use this flaw to downgrade LDAP connections to use no integrity protection, allowing them to hijack such connections. It was found that Samba's LDAP implementation did not enforce integrity protection for LDAP connections. That means NTLMv2 is onlyĬVE-2016-2112: LDAP client and server do not enforce integrity protection If this option, lanman auth, and ntlm auth are all disabled, onlyĬlients with SPNEGO support are permitted. Without extended security (without SPNEGO) to use NTLMv2 authentication. This parameter determines whether or not smbd(8) allows SMB1 clients The security advisory patch for this flaw introduces a new smb.conf option: raw NTLMv2 auth (G) This flaw is referred to as CVE-2015-0005 for Microsoft Windows Server. This flaw only affects Samba running as a classic primary DC, backup DC, or Active Directory DC. A remote attacker able to observe network traffic could use this flaw to obtain session-related information about the spoofed machine. It was discovered that Samba configured as a Domain Controller would establish a secure communication channel with a machine using a spoofed computer name. CVE-2016-2111: NETLOGON Spoofing Vulnerability These flaws affect all possible roles in which Samba can operate, and are related to CVE-2016-2112 and CVE-2016-2113. LDAP (with NTLMSSP authentication) is used as a client by various administrative Samba project tools (for example, "net", "samba-tool", "ldbsearch", or "ldbedit"). The attacker could also force the client or server into sending data in plain text even if encryption was explicitly requested for that connection. An unauthenticated, man-in-the-middle attacker could use this flaw to clear the encryption and integrity flags of a connection, causing data to be transmitted in plain text. Several flaws were found in Samba's implementation of NTLMSSP authentication. CVE-2016-2118 (Badlock): SAMR and LSA man-in-the-middle attacksĭetails about this flaw are available at: Badlock Security Flaw in Samba - CVE-2016-2118 CVE-2016-2110: Man-in-the-middle attacks possible with NTLMSSP Note: While Samba packages as shipped in Red Hat Enterprise Linux do not support running Samba as an AD DC, this flaw applies to all roles Samba implements. This flaw could also be used to downgrade a secure DCE/RPC connection by a man-in-the-middle attacker taking control of an Active Directory (AD) object and compromising the security of a Samba Active Directory Domain Controller (DC). A remote, authenticated attacker could use these flaws to cause a denial of service against the Samba server (high CPU load or a crash) or, possibly, execute arbitrary code with the permissions of the user running Samba (root). Multiple flaws were found in Samba's DCE/RPC protocol implementation. Affected versions: CVEĪll possible roles in which Samba can operateĬlassic primary DC, backup DC, or Active Directory DCĪll possible roles in which Samba can operate, but critical for Active Directory DCĬVE-2015-5370: Multiple flaws in DCE/RPC code For more information about the Badlock issue (CVE-2016-2118), refer to Knowledgebase article 2253041. Several flaws have been discovered and fixed across all currently supported versions of Samba. Samba is an open-source implementation of the Server Message Block (SMB) or Common Internet File System (CIFS) protocol, which allows PC-compatible machines to share files, printers, and other information.
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