RHEL 6 : samba4 (RHSA-2016:0449)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2016:0449. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(89955);
  script_version("2.11");
  script_cvs_date("Date: 2019/10/24 15:35:41");

  script_cve_id("CVE-2015-7560");
  script_xref(name:"RHSA", value:"2016:0449");

  script_name(english:"RHEL 6 : samba4 (RHSA-2016:0449)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated samba4 packages that fix one security issue are now available
for Red Hat Enterprise Linux 6.

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

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.

A flaw was found in the way Samba handled ACLs on symbolic links. An
authenticated user could use this flaw to gain access to an arbitrary
file or directory by overwriting its ACL. (CVE-2015-7560)

Red Hat would like to thank the Samba project for reporting this
issue. Upstream acknowledges Jeremy Allison (Google) and the Samba
team as the original reporters.

All samba4 users are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. After
installing this update, the smb service will be restarted
automatically."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2016:0449"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2015-7560"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N");
  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:L/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  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:redhat:enterprise_linux:samba4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-swat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba4-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/03/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/03/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/03/16");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x", "Red Hat " + 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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2016:0449";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-client-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-client-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-client-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-common-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-common-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-common-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-dc-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-dc-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-dc-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-dc-libs-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-dc-libs-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-dc-libs-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-debuginfo-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-debuginfo-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-debuginfo-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-devel-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-devel-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-devel-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-libs-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-libs-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-libs-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-pidl-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-pidl-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-pidl-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-python-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-python-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-python-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-swat-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-swat-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-swat-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-test-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-test-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-test-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-winbind-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-winbind-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-winbind-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-winbind-clients-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-winbind-clients-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-winbind-clients-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba4-winbind-krb5-locator-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba4-winbind-krb5-locator-4.0.0-68.el6_7.rc4")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba4-winbind-krb5-locator-4.0.0-68.el6_7.rc4")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "samba4 / samba4-client / samba4-common / samba4-dc / samba4-dc-libs / etc");
  }
}