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
AI Score
Confidence
Low
EPSS
Percentile
19.4%
The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:3027 advisory.
hw: Special Register Buffer Data Sampling (SRBDS) (CVE-2020-0543)
hw: Vector Register Data Sampling (CVE-2020-0548)
hw: L1D Cache Eviction Sampling (CVE-2020-0549)
hw: Information disclosure issue in Intel SGX via RAPL interface (CVE-2020-8695)
hw: Vector Register Leakage-Active (CVE-2020-8696)
hw: Fast forward store predictor (CVE-2020-8698)
hw: vt-d related privilege escalation (CVE-2020-24489)
hw: improper isolation of shared resources in some Intel Processors (CVE-2020-24511)
hw: observable timing discrepancy in some Intel Processors (CVE-2020-24512)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:3027. The text
# itself is copyright (C) Red Hat, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(152351);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/28");
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_xref(name:"RHSA", value:"2021:3027");
script_name(english:"RHEL 8 : microcode_ctl (RHSA-2021:3027)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as
referenced in the RHSA-2021:3027 advisory.
- hw: Special Register Buffer Data Sampling (SRBDS) (CVE-2020-0543)
- hw: Vector Register Data Sampling (CVE-2020-0548)
- hw: L1D Cache Eviction Sampling (CVE-2020-0549)
- hw: Information disclosure issue in Intel SGX via RAPL interface (CVE-2020-8695)
- hw: Vector Register Leakage-Active (CVE-2020-8696)
- hw: Fast forward store predictor (CVE-2020-8698)
- hw: vt-d related privilege escalation (CVE-2020-24489)
- hw: improper isolation of shared resources in some Intel Processors (CVE-2020-24511)
- hw: observable timing discrepancy in some Intel Processors (CVE-2020-24512)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
# https://access.redhat.com/security/data/csaf/v2/advisories/2021/rhsa-2021_3027.json
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2885f55e");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:3027");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1788786");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1788788");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1827165");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1828583");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1890355");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1890356");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1962650");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1962702");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1962722");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1972325");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1972328");
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_cwe_id(200, 212, 459);
script_set_attribute(attribute:"vendor_severity", value:"Important");
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:redhat:enterprise_linux:8");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:microcode_ctl");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat 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", "redhat_repos.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.x', 'Red Hat ' + 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$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
'repo_relative_urls': [
'content/dist/rhel8/8.10/x86_64/baseos/debug',
'content/dist/rhel8/8.10/x86_64/baseos/os',
'content/dist/rhel8/8.10/x86_64/baseos/source/SRPMS',
'content/dist/rhel8/8.6/x86_64/baseos/debug',
'content/dist/rhel8/8.6/x86_64/baseos/os',
'content/dist/rhel8/8.6/x86_64/baseos/source/SRPMS',
'content/dist/rhel8/8.8/x86_64/baseos/debug',
'content/dist/rhel8/8.8/x86_64/baseos/os',
'content/dist/rhel8/8.8/x86_64/baseos/source/SRPMS',
'content/dist/rhel8/8.9/x86_64/baseos/debug',
'content/dist/rhel8/8.9/x86_64/baseos/os',
'content/dist/rhel8/8.9/x86_64/baseos/source/SRPMS',
'content/dist/rhel8/8/x86_64/baseos/debug',
'content/dist/rhel8/8/x86_64/baseos/os',
'content/dist/rhel8/8/x86_64/baseos/source/SRPMS'
],
'pkgs': [
{'reference':'microcode_ctl-20210216-1.20210608.1.el8_4', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'}
]
}
];
var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);
var flag = 0;
foreach var constraint_array ( constraints ) {
var repo_relative_urls = NULL;
if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
foreach var pkg ( constraint_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;
var cves = NULL;
if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
if (reference &&
_release &&
rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
(applicable_repo_urls || (!exists_check || 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, cves:cves)) flag++;
}
}
if (flag)
{
var extra = NULL;
if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
else extra = rpm_report_get();
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
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
www.nessus.org/u?2885f55e
access.redhat.com/errata/RHSA-2021:3027
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=1788786
bugzilla.redhat.com/show_bug.cgi?id=1788788
bugzilla.redhat.com/show_bug.cgi?id=1827165
bugzilla.redhat.com/show_bug.cgi?id=1828583
bugzilla.redhat.com/show_bug.cgi?id=1890355
bugzilla.redhat.com/show_bug.cgi?id=1890356
bugzilla.redhat.com/show_bug.cgi?id=1962650
bugzilla.redhat.com/show_bug.cgi?id=1962702
bugzilla.redhat.com/show_bug.cgi?id=1962722
bugzilla.redhat.com/show_bug.cgi?id=1972325
bugzilla.redhat.com/show_bug.cgi?id=1972328
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
AI Score
Confidence
Low
EPSS
Percentile
19.4%