Vulnerabilities > CVE-2013-0172 - Permissions, Privileges, and Access Controls vulnerability in Samba 4.0.0

#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");


if (description)
{
  script_id(63561);
  script_version ("1.9");
  script_cvs_date("Date: 2018/11/15 20:50:24");

  script_cve_id("CVE-2013-0172");
  script_bugtraq_id(57329);

  script_name(english:"Samba 4.x < 4.0.1 AD DC LDAP Directory Objects Security Bypass");
  script_summary(english:"Checks version of Samba");
 
  script_set_attribute(attribute:"synopsis", value:
"The remote Samba server is affected by a security bypass
vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of Samba 4.x running on the remote
host is earlier than 4.0.1, and is, therefore, potentially affected by a
security bypass vulnerability. 

When acting as an Active Directory (AD) Domain Controller (DC), the
application can improperly grant write access to an LDAP directory
object or its attributes improperly.  This error can be triggered when a
user or group is granted any access to an LDAP directory object based on
objectClass or is granted write access to any attribute on the object. 

Note that, by default, the application does not make 'authenticated
users' a part of the 'pre-windows 2000 compatible access' group, which
is the group that typically receives the problematic per-objectClass
permission. 

Further note that Nessus has not actually tried to exploit this issue or
otherwise determine if the patch or workaround has been applied.");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2013-0172.html");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/history/samba-4.0.1.html");
  # https://download.samba.org/pub/samba/patches/security/samba-4.0.0-CVE-2013-0172.patch
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?80f5666c");
  script_set_attribute(attribute:"solution", value:
"Either install the patch referenced in the project's advisory or
upgrade to 4.0.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:"vuln_publication_date", value:"2013/01/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/01/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:samba:samba");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.");

  script_dependencies("smb_nativelanman.nasl");
  script_require_keys("SMB/NativeLanManager", "SMB/samba", "Settings/ParanoidReport");
  exit(0);
}


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


if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_kb_item("SMB/transport");
lanman = get_kb_item_or_exit("SMB/NativeLanManager");

if ("Samba " >!< lanman) audit(AUDIT_NOT_LISTEN, "Samba", port);
if (lanman =~ '^Samba 4(\\.0)?$') exit(1, "The version, "+lanman+", of the SMB service listening on port "+port+" is not granular enough to make a determination.");

version = lanman - 'Samba ';
ver = split(version, sep:'.', keep:FALSE);
for (i=0; i<max_index(ver); i++)
  ver[i] = int(ver[i]);

if (ver[0] == 4 && ver[1] == 0 && ver[2] == 0)
{
  if (report_verbosity > 0)
  {
    report = '\n  Installed version  : ' + version + 
             '\n  Fixed version      : 4.0.1\n';
    security_note(port:port, extra:report);
  }
  else security_note(port);
  exit(0);
}
else audit(AUDIT_LISTEN_NOT_VULN, "Samba", port, version);

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2013-0859.
#

include("compat.inc");

if (description)
{
  script_id(64087);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2013-0172");
  script_bugtraq_id(57329);
  script_xref(name:"FEDORA", value:"2013-0859");

  script_name(english:"Fedora 17 : samba4-4.0.0-59alpha18.fc17 (2013-0859)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security update for CVE-2013-0172.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=895631"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2013-January/097469.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e5bf81bd"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected samba4 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/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:fedoraproject:fedora:samba4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:17");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/01/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/25");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^17([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 17.x", "Fedora " + 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, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC17", reference:"samba4-4.0.0-59alpha18.fc17")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "samba4");
}