CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
19.4%
The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2021-3027 advisory.
Incomplete cleanup from specific special register read operations in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-0543)
Cleanup errors in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-0548)
Cleanup errors in some data cache evictions for some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-0549)
Observable discrepancy in the RAPL interface for some Intel® Processors may allow a privileged user to potentially enable information disclosure via local access. (CVE-2020-8695)
Improper removal of sensitive information before storage or transfer in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-8696)
Improper isolation of shared resources in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-24511, CVE-2020-8698)
Incomplete cleanup in some Intel® VT-d products may allow an authenticated user to potentially enable escalation of privilege via local access. (CVE-2020-24489)
Observable timing discrepancy in some Intel® Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-24512)
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-2021-3027.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(152365);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/08/09");
script_cve_id(
"CVE-2020-0543",
"CVE-2020-0548",
"CVE-2020-0549",
"CVE-2020-8695",
"CVE-2020-8696",
"CVE-2020-8698",
"CVE-2020-24489",
"CVE-2020-24511",
"CVE-2020-24512"
);
script_name(english:"Oracle Linux 8 : microcode_ctl (ELSA-2021-3027)");
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 a package installed that is affected by multiple vulnerabilities as referenced in the
ELSA-2021-3027 advisory.
- Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an
authenticated user to potentially enable information disclosure via local access. (CVE-2020-0543)
- Cleanup errors in some Intel(R) Processors may allow an authenticated user to potentially enable
information disclosure via local access. (CVE-2020-0548)
- Cleanup errors in some data cache evictions for some Intel(R) Processors may allow an authenticated user
to potentially enable information disclosure via local access. (CVE-2020-0549)
- Observable discrepancy in the RAPL interface for some Intel(R) Processors may allow a privileged user to
potentially enable information disclosure via local access. (CVE-2020-8695)
- Improper removal of sensitive information before storage or transfer in some Intel(R) Processors may allow
an authenticated user to potentially enable information disclosure via local access. (CVE-2020-8696)
- Improper isolation of shared resources in some Intel(R) Processors may allow an authenticated user to
potentially enable information disclosure via local access. (CVE-2020-24511, CVE-2020-8698)
- Incomplete cleanup in some Intel(R) VT-d products may allow an authenticated user to potentially enable
escalation of privilege via local access. (CVE-2020-24489)
- Observable timing discrepancy in some Intel(R) Processors may allow an authenticated user to potentially
enable information disclosure via local access. (CVE-2020-24512)
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-2021-3027.html");
script_set_attribute(attribute:"solution", value:
"Update the affected microcode_ctl package.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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-2020-24489");
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:"2020/01/28");
script_set_attribute(attribute:"patch_publication_date", value:"2021/08/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/09");
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:microcode_ctl");
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 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');
var 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');
var 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');
var os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
if ('x86_64' >!< cpu) audit(AUDIT_ARCH_NOT, 'x86_64', cpu);
var pkgs = [
{'reference':'microcode_ctl-20210216-1.20210608.1.0.1.el8_4', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var reference = NULL;
var release = NULL;
var sp = NULL;
var cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = 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['exists_check'])) exists_check = package_array['exists_check'];
if (reference && release) {
if (exists_check) {
if (rpm_exists(release:release, rpm:exists_check) && 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_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'microcode_ctl');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0543
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0548
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0549
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24489
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24511
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24512
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8695
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8696
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8698
linux.oracle.com/errata/ELSA-2021-3027.html
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
19.4%