RHEL 6 / 7 : samba (RHSA-2017:1270) (SambaCry)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:1270. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(100400);
  script_version("3.19");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/30");

  script_cve_id("CVE-2017-7494");
  script_xref(name:"RHSA", value:"2017:1270");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/04/20");

  script_name(english:"RHEL 6 / 7 : samba (RHSA-2017:1270) (SambaCry)");

  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 Enterprise Linux 6
and 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 remote code execution flaw was found in Samba. A malicious
authenticated samba client, having write access to the samba share,
could use this flaw to execute arbitrary code as root. (CVE-2017-7494)

Red Hat would like to thank the Samba project for reporting this
issue. Upstream acknowledges steelo as the original reporter.");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2017-7494.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/vulnerabilities/3034621");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2017:1270");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-7494");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-7494");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Samba is_known_pipename() Arbitrary Module Load');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/25");

  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-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-domainjoin-gui");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:samba-glusterfs");
  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-swat");
  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-devel");
  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:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x / 7.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-2017:1270";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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", reference:"libsmbclient-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", reference:"libsmbclient-devel-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-client-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-client-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-client-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", reference:"samba-common-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", reference:"samba-debuginfo-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-doc-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-doc-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-doc-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-domainjoin-gui-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-domainjoin-gui-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-domainjoin-gui-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-glusterfs-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-swat-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-swat-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-swat-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-winbind-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-winbind-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-winbind-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", reference:"samba-winbind-clients-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", reference:"samba-winbind-devel-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"samba-winbind-krb5-locator-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"samba-winbind-krb5-locator-3.6.23-43.el6_9")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"samba-winbind-krb5-locator-3.6.23-43.el6_9")) flag++;


  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"ctdb-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"ctdb-tests-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"libsmbclient-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"libsmbclient-devel-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"libwbclient-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"libwbclient-devel-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-client-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-client-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-client-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-common-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-common-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-common-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-common-tools-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-common-tools-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-dc-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-dc-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-dc-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-dc-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-debuginfo-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-devel-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-krb5-printing-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-krb5-printing-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-pidl-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-python-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-python-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-test-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-test-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-test-libs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-vfs-glusterfs-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-winbind-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-winbind-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-winbind-clients-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-winbind-clients-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"samba-winbind-krb5-locator-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"samba-winbind-krb5-locator-4.4.4-14.el7_3")) flag++;

  if (rpm_check(release:"RHEL7", reference:"samba-winbind-modules-4.4.4-14.el7_3")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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");
  }
}