Oracle Linux 7 : samba (ELSA-2017-3260)

2017-11-27T00:00:00
ID ORACLELINUX_ELSA-2017-3260.NASL
Type nessus
Reporter Tenable
Modified 2018-02-02T00:00:00

Description

From Red Hat Security Advisory 2017:3260 :

An update for samba is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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) :

  • A use-after-free flaw was found in the way samba servers handled certain SMB1 requests. An unauthenticated attacker could send specially crafted SMB1 requests to cause the server to crash or execute arbitrary code. (CVE-2017-14746)

  • A memory disclosure flaw was found in samba. An attacker could retrieve parts of server memory, which could contain potentially sensitive data, by sending specially crafted requests to the samba server. (CVE-2017-15275)

Red Hat would like to thank the Samba project for reporting these issues. Upstream acknowledges Yihan Lian and Zhibin Hu (Qihoo 360 GearTeam) as the original reporter of CVE-2017-14746; and Volker Lendecke (SerNet and the Samba Team) as the original reporter of CVE-2017-15275.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:3260 and 
# Oracle Linux Security Advisory ELSA-2017-3260 respectively.
#

include("compat.inc");

if (description)
{
  script_id(104773);
  script_version("$Revision: 3.7 $");
  script_cvs_date("$Date: 2018/02/02 16:15:51 $");

  script_cve_id("CVE-2017-14746", "CVE-2017-15275");
  script_osvdb_id(169664, 169665);
  script_xref(name:"RHSA", value:"2017:3260");
  script_xref(name:"IAVA", value:"2017-A-0344");

  script_name(english:"Oracle Linux 7 : samba (ELSA-2017-3260)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2017:3260 :

An update for samba is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

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) :

* A use-after-free flaw was found in the way samba servers handled
certain SMB1 requests. An unauthenticated attacker could send
specially crafted SMB1 requests to cause the server to crash or
execute arbitrary code. (CVE-2017-14746)

* A memory disclosure flaw was found in samba. An attacker could
retrieve parts of server memory, which could contain potentially
sensitive data, by sending specially crafted requests to the samba
server. (CVE-2017-15275)

Red Hat would like to thank the Samba project for reporting these
issues. Upstream acknowledges Yihan Lian and Zhibin Hu (Qihoo 360
GearTeam) as the original reporter of CVE-2017-14746; and Volker
Lendecke (SerNet and the Samba Team) as the original reporter of
CVE-2017-15275."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2017-November/007355.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected samba packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ctdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ctdb-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libsmbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libwbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-client-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-common-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-common-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-krb5-printing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-test-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-vfs-glusterfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind-modules");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/27");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! ereg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 7", "Oracle Linux " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"ctdb-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"ctdb-tests-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libsmbclient-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libsmbclient-devel-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libwbclient-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"libwbclient-devel-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-client-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-client-libs-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-common-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-common-libs-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-common-tools-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-dc-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-dc-libs-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-devel-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-krb5-printing-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-libs-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-pidl-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-python-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-test-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-test-libs-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-vfs-glusterfs-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-winbind-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-winbind-clients-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-winbind-krb5-locator-4.6.2-12.el7_4")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"samba-winbind-modules-4.6.2-12.el7_4")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ctdb / ctdb-tests / libsmbclient / libsmbclient-devel / libwbclient / etc");
}