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nessusUbuntu Security Notice (C) 2019-2023 Canonical, Inc. / NASL script (C) 2019-2023 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-3895-1.NASL
HistoryFeb 27, 2019 - 12:00 a.m.

Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : LDB vulnerability (USN-3895-1)

2019-02-2700:00:00
Ubuntu Security Notice (C) 2019-2023 Canonical, Inc. / NASL script (C) 2019-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
8

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

4 Medium

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.007 Low

EPSS

Percentile

80.1%

It was discovered that LDB incorrectly handled certain search expressions. A remote attacker could possibly use this issue to cause the Samba LDAP process to crash, resulting in a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3895-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(122481);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/21");

  script_cve_id("CVE-2019-3824");
  script_xref(name:"USN", value:"3895-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : LDB vulnerability (USN-3895-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It was discovered that LDB incorrectly handled certain search
expressions. A remote attacker could possibly use this issue to cause
the Samba LDAP process to crash, resulting in a denial of service.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-3895-1");
  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:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3824");

  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:"2019/03/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libldb1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-ldb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-ldb-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-ldb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-ldb-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ldb-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libldb-dev");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2019-2023 Canonical, Inc. / NASL script (C) 2019-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'ldb-tools', 'pkgver': '1:1.1.24-0ubuntu0.14.04.2'},
    {'osver': '14.04', 'pkgname': 'libldb-dev', 'pkgver': '1:1.1.24-0ubuntu0.14.04.2'},
    {'osver': '14.04', 'pkgname': 'libldb1', 'pkgver': '1:1.1.24-0ubuntu0.14.04.2'},
    {'osver': '14.04', 'pkgname': 'python-ldb', 'pkgver': '1:1.1.24-0ubuntu0.14.04.2'},
    {'osver': '14.04', 'pkgname': 'python-ldb-dev', 'pkgver': '1:1.1.24-0ubuntu0.14.04.2'},
    {'osver': '16.04', 'pkgname': 'ldb-tools', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '16.04', 'pkgname': 'libldb-dev', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '16.04', 'pkgname': 'libldb1', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '16.04', 'pkgname': 'python-ldb', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '16.04', 'pkgname': 'python-ldb-dev', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '16.04', 'pkgname': 'python3-ldb', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '16.04', 'pkgname': 'python3-ldb-dev', 'pkgver': '2:1.1.24-1ubuntu3.1'},
    {'osver': '18.04', 'pkgname': 'ldb-tools', 'pkgver': '2:1.2.3-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libldb-dev', 'pkgver': '2:1.2.3-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libldb1', 'pkgver': '2:1.2.3-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'python-ldb', 'pkgver': '2:1.2.3-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'python-ldb-dev', 'pkgver': '2:1.2.3-1ubuntu0.1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ldb-tools / libldb-dev / libldb1 / python-ldb / python-ldb-dev / etc');
}
VendorProductVersionCPE
canonicalubuntu_linuxlibldb1p-cpe:/a:canonical:ubuntu_linux:libldb1
canonicalubuntu_linuxpython-ldbp-cpe:/a:canonical:ubuntu_linux:python-ldb
canonicalubuntu_linuxpython-ldb-devp-cpe:/a:canonical:ubuntu_linux:python-ldb-dev
canonicalubuntu_linuxpython3-ldbp-cpe:/a:canonical:ubuntu_linux:python3-ldb
canonicalubuntu_linuxpython3-ldb-devp-cpe:/a:canonical:ubuntu_linux:python3-ldb-dev
canonicalubuntu_linux14.04cpe:/o:canonical:ubuntu_linux:14.04:-:lts
canonicalubuntu_linux16.04cpe:/o:canonical:ubuntu_linux:16.04:-:lts
canonicalubuntu_linux18.04cpe:/o:canonical:ubuntu_linux:18.04:-:lts
canonicalubuntu_linuxldb-toolsp-cpe:/a:canonical:ubuntu_linux:ldb-tools
canonicalubuntu_linuxlibldb-devp-cpe:/a:canonical:ubuntu_linux:libldb-dev

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

4 Medium

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:N/I:N/A:P

0.007 Low

EPSS

Percentile

80.1%