The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1647 advisory.
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka ‘Netlogon Elevation of Privilege Vulnerability’. (CVE-2020-1472)
A flaw was found in the way samba handled file and directory permissions. An authenticated user could use this flaw to gain access to certain file and directory information which otherwise would be unavailable to the attacker. (CVE-2020-14318)
A null pointer dereference flaw was found in samba’s Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of service. (CVE-2020-14323)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2021-1647.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(149965);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/04");
script_cve_id("CVE-2020-1472", "CVE-2020-14318", "CVE-2020-14323");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2020/09/21");
script_xref(name:"CISA-NCAS", value:"AA22-011A");
script_xref(name:"CEA-ID", value:"CEA-2021-0025");
script_xref(name:"CEA-ID", value:"CEA-2021-0008");
script_xref(name:"CEA-ID", value:"CEA-2020-0129");
script_xref(name:"CEA-ID", value:"CEA-2020-0121");
script_xref(name:"CEA-ID", value:"CEA-2020-0101");
script_xref(name:"CEA-ID", value:"CEA-2023-0016");
script_name(english:"Oracle Linux 8 : samba (ELSA-2021-1647)");
script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2021-1647 advisory.
- An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure
channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon
Elevation of Privilege Vulnerability'. (CVE-2020-1472)
- A flaw was found in the way samba handled file and directory permissions. An authenticated user could use
this flaw to gain access to certain file and directory information which otherwise would be unavailable to
the attacker. (CVE-2020-14318)
- A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before
4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of
service. (CVE-2020-14323)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://linux.oracle.com/errata/ELSA-2021-1647.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1472");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/08/11");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/26");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ctdb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ctdb-tests");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libsmbclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libsmbclient-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libwbclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libwbclient-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openchange");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-samba");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-samba-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-client-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-common-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-common-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-krb5-printing");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-pidl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-test-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind-clients");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind-krb5-locator");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winbind-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:samba-winexe");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Oracle Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");
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);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
pkgs = [
{'reference':'ctdb-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ctdb-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ctdb-tests-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ctdb-tests-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmbclient-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmbclient-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmbclient-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmbclient-devel-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmbclient-devel-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmbclient-devel-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libwbclient-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libwbclient-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libwbclient-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libwbclient-devel-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libwbclient-devel-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libwbclient-devel-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openchange-2.3-27.0.1.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openchange-2.3-27.0.1.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'openchange-2.3-27.0.1.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-samba-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-samba-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-samba-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-samba-test-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-samba-test-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-client-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-client-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-client-libs-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-client-libs-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-client-libs-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-common-4.13.3-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-common-libs-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-common-libs-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-common-tools-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-common-tools-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-devel-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-devel-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-devel-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-krb5-printing-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-krb5-printing-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-libs-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-libs-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-libs-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-pidl-4.13.3-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-test-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-test-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-test-libs-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-test-libs-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-clients-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-clients-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-krb5-locator-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-krb5-locator-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-modules-4.13.3-3.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-modules-4.13.3-3.el8', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winbind-modules-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'samba-winexe-4.13.3-3.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
];
flag = 0;
foreach package_array ( pkgs ) {
reference = NULL;
release = NULL;
sp = NULL;
cpu = NULL;
el_string = NULL;
rpm_spec_vers_cmp = NULL;
epoch = NULL;
allowmaj = NULL;
rpm_prefix = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = 'EL' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['rpm_prefix'])) rpm_prefix = package_array['rpm_prefix'];
if (reference && release) {
if (rpm_prefix) {
if (rpm_exists(release:release, rpm:rpm_prefix) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
} else {
if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
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 / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
oracle | linux | 8 | cpe:/o:oracle:linux:8 |
oracle | linux | ctdb | p-cpe:/a:oracle:linux:ctdb |
oracle | linux | ctdb-tests | p-cpe:/a:oracle:linux:ctdb-tests |
oracle | linux | libsmbclient | p-cpe:/a:oracle:linux:libsmbclient |
oracle | linux | libsmbclient-devel | p-cpe:/a:oracle:linux:libsmbclient-devel |
oracle | linux | libwbclient | p-cpe:/a:oracle:linux:libwbclient |
oracle | linux | libwbclient-devel | p-cpe:/a:oracle:linux:libwbclient-devel |
oracle | linux | openchange | p-cpe:/a:oracle:linux:openchange |
oracle | linux | python3-samba | p-cpe:/a:oracle:linux:python3-samba |
oracle | linux | python3-samba-test | p-cpe:/a:oracle:linux:python3-samba-test |