The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:2431 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)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:2431. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(137276);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/23");
script_cve_id("CVE-2020-0543", "CVE-2020-0548", "CVE-2020-0549");
script_xref(name:"RHSA", value:"2020:2431");
script_name(english:"RHEL 8 : microcode_ctl (RHSA-2020:2431)");
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-2020:2431 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)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-0543");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-0548");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-0549");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:2431");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1788786");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1788788");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1827165");
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:N/A:N");
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:U/C:H/I:N/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-2020-0549");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(200, 203);
script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/28");
script_set_attribute(attribute:"patch_publication_date", value:"2020/06/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/09");
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:"cpe:/o:redhat:rhel_aus:8.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:8.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:8.6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:8.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:8.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:8.6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:8.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:8.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:8.6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:8.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:8.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:8.6");
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) 2020-2023 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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
'repo_relative_urls': [
'content/aus/rhel8/8.2/x86_64/appstream/debug',
'content/aus/rhel8/8.2/x86_64/appstream/os',
'content/aus/rhel8/8.2/x86_64/appstream/source/SRPMS',
'content/aus/rhel8/8.2/x86_64/baseos/debug',
'content/aus/rhel8/8.2/x86_64/baseos/os',
'content/aus/rhel8/8.2/x86_64/baseos/source/SRPMS',
'content/e4s/rhel8/8.2/x86_64/appstream/debug',
'content/e4s/rhel8/8.2/x86_64/appstream/os',
'content/e4s/rhel8/8.2/x86_64/appstream/source/SRPMS',
'content/e4s/rhel8/8.2/x86_64/baseos/debug',
'content/e4s/rhel8/8.2/x86_64/baseos/os',
'content/e4s/rhel8/8.2/x86_64/baseos/source/SRPMS',
'content/e4s/rhel8/8.2/x86_64/highavailability/debug',
'content/e4s/rhel8/8.2/x86_64/highavailability/os',
'content/e4s/rhel8/8.2/x86_64/highavailability/source/SRPMS',
'content/e4s/rhel8/8.2/x86_64/sap-solutions/debug',
'content/e4s/rhel8/8.2/x86_64/sap-solutions/os',
'content/e4s/rhel8/8.2/x86_64/sap-solutions/source/SRPMS',
'content/e4s/rhel8/8.2/x86_64/sap/debug',
'content/e4s/rhel8/8.2/x86_64/sap/os',
'content/e4s/rhel8/8.2/x86_64/sap/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/appstream/debug',
'content/eus/rhel8/8.2/x86_64/appstream/os',
'content/eus/rhel8/8.2/x86_64/appstream/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/baseos/debug',
'content/eus/rhel8/8.2/x86_64/baseos/os',
'content/eus/rhel8/8.2/x86_64/baseos/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/codeready-builder/debug',
'content/eus/rhel8/8.2/x86_64/codeready-builder/os',
'content/eus/rhel8/8.2/x86_64/codeready-builder/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/highavailability/debug',
'content/eus/rhel8/8.2/x86_64/highavailability/os',
'content/eus/rhel8/8.2/x86_64/highavailability/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/resilientstorage/debug',
'content/eus/rhel8/8.2/x86_64/resilientstorage/os',
'content/eus/rhel8/8.2/x86_64/resilientstorage/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/sap-solutions/debug',
'content/eus/rhel8/8.2/x86_64/sap-solutions/os',
'content/eus/rhel8/8.2/x86_64/sap-solutions/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/sap/debug',
'content/eus/rhel8/8.2/x86_64/sap/os',
'content/eus/rhel8/8.2/x86_64/sap/source/SRPMS',
'content/eus/rhel8/8.2/x86_64/supplementary/debug',
'content/eus/rhel8/8.2/x86_64/supplementary/os',
'content/eus/rhel8/8.2/x86_64/supplementary/source/SRPMS',
'content/tus/rhel8/8.2/x86_64/appstream/debug',
'content/tus/rhel8/8.2/x86_64/appstream/os',
'content/tus/rhel8/8.2/x86_64/appstream/source/SRPMS',
'content/tus/rhel8/8.2/x86_64/baseos/debug',
'content/tus/rhel8/8.2/x86_64/baseos/os',
'content/tus/rhel8/8.2/x86_64/baseos/source/SRPMS',
'content/tus/rhel8/8.2/x86_64/highavailability/debug',
'content/tus/rhel8/8.2/x86_64/highavailability/os',
'content/tus/rhel8/8.2/x86_64/highavailability/source/SRPMS',
'content/tus/rhel8/8.2/x86_64/nfv/debug',
'content/tus/rhel8/8.2/x86_64/nfv/os',
'content/tus/rhel8/8.2/x86_64/nfv/source/SRPMS',
'content/tus/rhel8/8.2/x86_64/rt/debug',
'content/tus/rhel8/8.2/x86_64/rt/os',
'content/tus/rhel8/8.2/x86_64/rt/source/SRPMS'
],
'pkgs': [
{'reference':'microcode_ctl-20191115-4.20200602.2.el8_2', 'sp':'2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'}
]
},
{
'repo_relative_urls': [
'content/aus/rhel8/8.4/x86_64/appstream/debug',
'content/aus/rhel8/8.4/x86_64/appstream/os',
'content/aus/rhel8/8.4/x86_64/appstream/source/SRPMS',
'content/aus/rhel8/8.4/x86_64/baseos/debug',
'content/aus/rhel8/8.4/x86_64/baseos/os',
'content/aus/rhel8/8.4/x86_64/baseos/source/SRPMS',
'content/e4s/rhel8/8.4/x86_64/appstream/debug',
'content/e4s/rhel8/8.4/x86_64/appstream/os',
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'content/e4s/rhel8/8.4/x86_64/baseos/debug',
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'content/e4s/rhel8/8.4/x86_64/highavailability/source/SRPMS',
'content/e4s/rhel8/8.4/x86_64/sap-solutions/debug',
'content/e4s/rhel8/8.4/x86_64/sap-solutions/os',
'content/e4s/rhel8/8.4/x86_64/sap-solutions/source/SRPMS',
'content/e4s/rhel8/8.4/x86_64/sap/debug',
'content/e4s/rhel8/8.4/x86_64/sap/os',
'content/e4s/rhel8/8.4/x86_64/sap/source/SRPMS',
'content/eus/rhel8/8.4/x86_64/appstream/debug',
'content/eus/rhel8/8.4/x86_64/appstream/os',
'content/eus/rhel8/8.4/x86_64/appstream/source/SRPMS',
'content/eus/rhel8/8.4/x86_64/baseos/debug',
'content/eus/rhel8/8.4/x86_64/baseos/os',
'content/eus/rhel8/8.4/x86_64/baseos/source/SRPMS',
'content/eus/rhel8/8.4/x86_64/codeready-builder/debug',
'content/eus/rhel8/8.4/x86_64/codeready-builder/os',
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'content/eus/rhel8/8.4/x86_64/highavailability/os',
'content/eus/rhel8/8.4/x86_64/highavailability/source/SRPMS',
'content/eus/rhel8/8.4/x86_64/resilientstorage/debug',
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'content/tus/rhel8/8.4/x86_64/appstream/os',
'content/tus/rhel8/8.4/x86_64/appstream/source/SRPMS',
'content/tus/rhel8/8.4/x86_64/baseos/debug',
'content/tus/rhel8/8.4/x86_64/baseos/os',
'content/tus/rhel8/8.4/x86_64/baseos/source/SRPMS',
'content/tus/rhel8/8.4/x86_64/highavailability/debug',
'content/tus/rhel8/8.4/x86_64/highavailability/os',
'content/tus/rhel8/8.4/x86_64/highavailability/source/SRPMS',
'content/tus/rhel8/8.4/x86_64/nfv/debug',
'content/tus/rhel8/8.4/x86_64/nfv/os',
'content/tus/rhel8/8.4/x86_64/nfv/source/SRPMS',
'content/tus/rhel8/8.4/x86_64/rt/debug',
'content/tus/rhel8/8.4/x86_64/rt/os',
'content/tus/rhel8/8.4/x86_64/rt/source/SRPMS'
],
'pkgs': [
{'reference':'microcode_ctl-20191115-4.20200602.2.el8_2', 'sp':'4', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'}
]
},
{
'repo_relative_urls': [
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'content/e4s/rhel8/8.6/x86_64/sap/debug',
'content/e4s/rhel8/8.6/x86_64/sap/os',
'content/e4s/rhel8/8.6/x86_64/sap/source/SRPMS',
'content/eus/rhel8/8.6/x86_64/appstream/debug',
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'content/tus/rhel8/8.6/x86_64/appstream/debug',
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'content/tus/rhel8/8.6/x86_64/baseos/os',
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'content/tus/rhel8/8.6/x86_64/highavailability/debug',
'content/tus/rhel8/8.6/x86_64/highavailability/os',
'content/tus/rhel8/8.6/x86_64/highavailability/source/SRPMS',
'content/tus/rhel8/8.6/x86_64/rt/os',
'content/tus/rhel8/8.6/x86_64/rt/source/SRPMS'
],
'pkgs': [
{'reference':'microcode_ctl-20191115-4.20200602.2.el8_2', 'sp':'6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'4'}
]
},
{
'repo_relative_urls': [
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'content/dist/rhel8/8/x86_64/highavailability/os',
'content/dist/rhel8/8/x86_64/highavailability/source/SRPMS',
'content/dist/rhel8/8/x86_64/nfv/debug',
'content/dist/rhel8/8/x86_64/nfv/os',
'content/dist/rhel8/8/x86_64/nfv/source/SRPMS',
'content/dist/rhel8/8/x86_64/resilientstorage/debug',
'content/dist/rhel8/8/x86_64/resilientstorage/os',
'content/dist/rhel8/8/x86_64/resilientstorage/source/SRPMS',
'content/dist/rhel8/8/x86_64/rt/debug',
'content/dist/rhel8/8/x86_64/rt/os',
'content/dist/rhel8/8/x86_64/rt/source/SRPMS',
'content/dist/rhel8/8/x86_64/sap-solutions/debug',
'content/dist/rhel8/8/x86_64/sap-solutions/os',
'content/dist/rhel8/8/x86_64/sap-solutions/source/SRPMS',
'content/dist/rhel8/8/x86_64/sap/debug',
'content/dist/rhel8/8/x86_64/sap/os',
'content/dist/rhel8/8/x86_64/sap/source/SRPMS',
'content/dist/rhel8/8/x86_64/supplementary/debug',
'content/dist/rhel8/8/x86_64/supplementary/os',
'content/dist/rhel8/8/x86_64/supplementary/source/SRPMS'
],
'pkgs': [
{'reference':'microcode_ctl-20191115-4.20200602.2.el8_2', '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'];
var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls: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;
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']) && !enterprise_linux_flag) 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 (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)) flag++;
}
}
if (flag)
{
var extra = NULL;
if (empty_or_null(applicable_repo_urls)) extra = rpm_report_get() + redhat_report_repo_caveat();
else extra = rpm_report_get() + redhat_report_package_caveat();
security_report_v4(
port : 0,
severity : SECURITY_NOTE,
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');
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | 8 | cpe:/o:redhat:enterprise_linux:8 |
redhat | rhel_aus | 8.2 | cpe:/o:redhat:rhel_aus:8.2 |
redhat | rhel_aus | 8.4 | cpe:/o:redhat:rhel_aus:8.4 |
redhat | rhel_aus | 8.6 | cpe:/o:redhat:rhel_aus:8.6 |
redhat | rhel_e4s | 8.2 | cpe:/o:redhat:rhel_e4s:8.2 |
redhat | rhel_e4s | 8.4 | cpe:/o:redhat:rhel_e4s:8.4 |
redhat | rhel_e4s | 8.6 | cpe:/o:redhat:rhel_e4s:8.6 |
redhat | rhel_eus | 8.2 | cpe:/o:redhat:rhel_eus:8.2 |
redhat | rhel_eus | 8.4 | cpe:/o:redhat:rhel_eus:8.4 |
redhat | rhel_eus | 8.6 | cpe:/o:redhat:rhel_eus:8.6 |
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
access.redhat.com/errata/RHSA-2020:2431
access.redhat.com/security/cve/CVE-2020-0543
access.redhat.com/security/cve/CVE-2020-0548
access.redhat.com/security/cve/CVE-2020-0549
bugzilla.redhat.com/1788786
bugzilla.redhat.com/1788788
bugzilla.redhat.com/1827165