RHEL 6 : Gluster Storage (RHSA-2017:0494)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:0494. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(97930);
  script_version("3.14");
  script_cvs_date("Date: 2019/10/24 15:35:42");

  script_cve_id("CVE-2016-2125", "CVE-2016-2126");
  script_xref(name:"RHSA", value:"2017:0494");

  script_name(english:"RHEL 6 : Gluster Storage (RHSA-2017:0494)");
  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:
"An update for samba is now available for Red Hat Gluster Storage 3.2
for RHEL 6.

Red Hat Product Security has rated this update as having a security
impact of Moderate. 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.

The following packages have been upgraded to a later upstream version:
samba (4.4.6). (BZ#1382291)

Security Fix(es) :

* It was found that Samba always requested forwardable tickets when
using Kerberos authentication. A service to which Samba authenticated
using Kerberos could subsequently use the ticket to impersonate Samba
to other services or domain users. (CVE-2016-2125)

* A flaw was found in the way Samba handled PAC (Privilege Attribute
Certificate) checksums. A remote, authenticated attacker could use
this flaw to crash the winbindd process. (CVE-2016-2126)

Enhancement(s) :

* The gluster vfs plugin now supports more than one volfile server.
Samba tries to connect to the next server on the list if one of the
gluster servers is not reachable. (BZ#1330081)

* This update provides stability and improvements in error handling
and code maintainability in the shadow copy module. (BZ#1385663)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2017:0494"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-2125"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-2126"
  );
  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:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:ctdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ctdb-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsmbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libwbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-client-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-common-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-common-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-krb5-printing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-python");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-test-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-vfs-glusterfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-winbind-modules");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/24");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 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-2017:0494";
  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_exists(release:"RHEL6", rpm:"glusterfs-server"))) audit(AUDIT_PACKAGE_NOT_INSTALLED, "Gluster Storage");

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"ctdb-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"ctdb-tests-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"libsmbclient-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"libsmbclient-devel-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"libwbclient-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"libwbclient-devel-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-client-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-client-libs-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"samba-common-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-common-libs-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-common-tools-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-dc-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-dc-libs-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-debuginfo-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-devel-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-krb5-printing-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-libs-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"samba-pidl-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-python-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-test-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-test-libs-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-vfs-glusterfs-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-winbind-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-winbind-clients-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-winbind-krb5-locator-4.4.6-4.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-winbind-modules-4.4.6-4.el6")) 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, "ctdb / ctdb-tests / libsmbclient / libsmbclient-devel / libwbclient / etc");
  }
}