5.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.006 Low
EPSS
Percentile
78.5%
It was discovered that Samba did not automatically replicate ACLs set to inherit down a subtree on AD Directory, contrary to expectations.
This issue was only addressed in Ubuntu 18.04 LTS, Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-14902)
Robert Swiecki discovered that Samba incorrectly handled certain character conversions when the log level is set to 3 or above. In certain environments, a remote attacker could possibly use this issue to cause Samba to crash, resulting in a denial of service.
(CVE-2019-14907)
Christian Naumer discovered that Samba incorrectly handled DNS zone scavenging. This issue could possibly result in some incorrect data being written to the DB. This issue only applied to Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-19344).
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-4244-1. 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(133178);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/21");
script_cve_id("CVE-2019-14902", "CVE-2019-14907", "CVE-2019-19344");
script_xref(name:"USN", value:"4244-1");
script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS : Samba vulnerabilities (USN-4244-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"It was discovered that Samba did not automatically replicate ACLs set
to inherit down a subtree on AD Directory, contrary to expectations.
This issue was only addressed in Ubuntu 18.04 LTS, Ubuntu 19.04 and
Ubuntu 19.10. (CVE-2019-14902)
Robert Swiecki discovered that Samba incorrectly handled certain
character conversions when the log level is set to 3 or above. In
certain environments, a remote attacker could possibly use this issue
to cause Samba to crash, resulting in a denial of service.
(CVE-2019-14907)
Christian Naumer discovered that Samba incorrectly handled DNS zone
scavenging. This issue could possibly result in some incorrect data
being written to the DB. This issue only applied to Ubuntu 19.04 and
Ubuntu 19.10. (CVE-2019-19344).
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-4244-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/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:L/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-14902");
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:"2020/01/21");
script_set_attribute(attribute:"patch_publication_date", value:"2020/01/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/22");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-common-bin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-dsdb-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-testsuite");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-vfs-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:smbclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:winbind");
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:ctdb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnss-winbind");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpam-winbind");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libparse-pidl-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsmbclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsmbclient-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwbclient-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwbclient0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-samba");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:registry-tools");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 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 (! ('16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 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': '16.04', 'pkgname': 'ctdb', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libnss-winbind', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libpam-winbind', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libparse-pidl-perl', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libsmbclient', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libsmbclient-dev', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libwbclient-dev', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'libwbclient0', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'python-samba', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'registry-tools', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-common', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-common-bin', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-dev', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-dsdb-modules', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-libs', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-testsuite', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'samba-vfs-modules', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'smbclient', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '16.04', 'pkgname': 'winbind', 'pkgver': '2:4.3.11+dfsg-0ubuntu0.16.04.25'},
{'osver': '18.04', 'pkgname': 'ctdb', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libnss-winbind', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libpam-winbind', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libparse-pidl-perl', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libsmbclient', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libsmbclient-dev', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libwbclient-dev', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'libwbclient0', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'python-samba', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'registry-tools', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-common', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-common-bin', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-dev', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-dsdb-modules', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-libs', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-testsuite', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'samba-vfs-modules', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'smbclient', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'},
{'osver': '18.04', 'pkgname': 'winbind', 'pkgver': '2:4.7.6+dfsg~ubuntu-0ubuntu2.15'}
];
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, 'ctdb / libnss-winbind / libpam-winbind / libparse-pidl-perl / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | samba | p-cpe:/a:canonical:ubuntu_linux:samba |
canonical | ubuntu_linux | samba-common | p-cpe:/a:canonical:ubuntu_linux:samba-common |
canonical | ubuntu_linux | samba-common-bin | p-cpe:/a:canonical:ubuntu_linux:samba-common-bin |
canonical | ubuntu_linux | samba-dev | p-cpe:/a:canonical:ubuntu_linux:samba-dev |
canonical | ubuntu_linux | samba-dsdb-modules | p-cpe:/a:canonical:ubuntu_linux:samba-dsdb-modules |
canonical | ubuntu_linux | samba-libs | p-cpe:/a:canonical:ubuntu_linux:samba-libs |
canonical | ubuntu_linux | samba-testsuite | p-cpe:/a:canonical:ubuntu_linux:samba-testsuite |
canonical | ubuntu_linux | samba-vfs-modules | p-cpe:/a:canonical:ubuntu_linux:samba-vfs-modules |
canonical | ubuntu_linux | smbclient | p-cpe:/a:canonical:ubuntu_linux:smbclient |
canonical | ubuntu_linux | winbind | p-cpe:/a:canonical:ubuntu_linux:winbind |
5.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.006 Low
EPSS
Percentile
78.5%