The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2016:0611 advisory.

    Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common     Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and     various information.

    Security Fix(es):

    * Multiple flaws were found in Samba's DCE/RPC protocol implementation. 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). 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). (CVE-2015-5370)

    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.

    * A protocol flaw, publicly referred to as Badlock, was found in the Security Account Manager Remote     Protocol (MS-SAMR) and the Local Security Authority (Domain Policy) Remote Protocol (MS-LSAD). Any     authenticated DCE/RPC connection that a client initiates against a server could be used by a man-in-the-     middle attacker to impersonate the authenticated user against the SAMR or LSA service on the server. As a     result, the attacker would be able to get read/write access to the Security Account Manager database, and     use this to reveal all passwords or any other potentially sensitive information in that database.
    (CVE-2016-2118)

    * Several flaws were found in Samba's implementation of NTLMSSP authentication. 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. The attacker could also force the client or server into     sending data in plain text even if encryption was explicitly requested for that connection.
    (CVE-2016-2110)

    * It was discovered that Samba configured as a Domain Controller would establish a secure communication     channel with a machine using a spoofed computer name. A remote attacker able to observe network traffic     could use this flaw to obtain session-related information about the spoofed machine. (CVE-2016-2111)

    * It was found that Samba's LDAP implementation did not enforce integrity protection for LDAP connections.
    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. (CVE-2016-2112)

    * It was found that Samba did not enable integrity protection for IPC traffic by default. A man-in-the-     middle attacker could use this flaw to view and modify the data sent between a Samba server and a client.
    (CVE-2016-2115)

    Red Hat would like to thank the Samba project for reporting these issues. Upstream acknowledges Jouni     Knuutinen (Synopsis) as the original reporter of CVE-2015-5370; and Stefan Metzmacher (SerNet) as the     original reporter of CVE-2016-2118, CVE-2016-2110, CVE-2016-2112, and CVE-2016-2115.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

RHEL 6 : samba (RHSA-2016:0611)

high Nessus Plugin ID 90491

Version 2.19