7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
32.6%
The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:3184 advisory.
The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.
Security Fix(es):
* grub2: grub2-set-bootflag can be abused by local (pseudo-)users (CVE-2024-1048)
* grub2: Out-of-bounds write at fs/ntfs.c may lead to unsigned code execution (CVE-2023-4692)
* grub2: out-of-bounds read at fs/ntfs.c (CVE-2023-4693)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.10 Release Notes linked from the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
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 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2024:3184. The text
# itself is copyright (C) Red Hat, Inc.
##
include('compat.inc');
if (description)
{
script_id(197787);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/23");
script_cve_id("CVE-2023-4692", "CVE-2023-4693", "CVE-2024-1048");
script_xref(name:"RHSA", value:"2024:3184");
script_name(english:"RHEL 8 : grub2 (RHSA-2024:3184)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for grub2.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2024:3184 advisory.
The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and
customizable boot loader with modular architecture. The packages support a variety of kernel formats, file
systems, computer architectures, and hardware devices.
Security Fix(es):
* grub2: grub2-set-bootflag can be abused by local (pseudo-)users (CVE-2024-1048)
* grub2: Out-of-bounds write at fs/ntfs.c may lead to unsigned code execution (CVE-2023-4692)
* grub2: out-of-bounds read at fs/ntfs.c (CVE-2023-4693)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.10 Release Notes
linked from the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
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/updates/classification/#moderate");
# https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.10_release_notes/index
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?99ff6172");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2236613");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2238343");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2256827");
script_set_attribute(attribute:"see_also", value:"https://issues.redhat.com/browse/RHEL-4314");
script_set_attribute(attribute:"see_also", value:"https://issues.redhat.com/browse/RHEL-4343");
# https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_3184.json
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dfa83822");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:3184");
script_set_attribute(attribute:"solution", value:
"Update the RHEL grub2 package based on the guidance in RHSA-2024:3184.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/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:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-4692");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_cwe_id(122, 125, 459);
script_set_attribute(attribute:"vendor_severity", value:"Moderate");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/10/25");
script_set_attribute(attribute:"patch_publication_date", value:"2024/05/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/23");
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:grub2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-pc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-pc-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-tools-efi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-tools-extra");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:grub2-tools-minimal");
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) 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/aarch64/baseos/debug',
'content/dist/rhel8/8.10/aarch64/baseos/os',
'content/dist/rhel8/8.10/aarch64/baseos/source/SRPMS',
'content/dist/rhel8/8.10/ppc64le/baseos/debug',
'content/dist/rhel8/8.10/ppc64le/baseos/os',
'content/dist/rhel8/8.10/ppc64le/baseos/source/SRPMS',
'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/aarch64/baseos/debug',
'content/dist/rhel8/8.6/aarch64/baseos/os',
'content/dist/rhel8/8.6/aarch64/baseos/source/SRPMS',
'content/dist/rhel8/8.6/ppc64le/baseos/debug',
'content/dist/rhel8/8.6/ppc64le/baseos/os',
'content/dist/rhel8/8.6/ppc64le/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/aarch64/baseos/debug',
'content/dist/rhel8/8.8/aarch64/baseos/os',
'content/dist/rhel8/8.8/aarch64/baseos/source/SRPMS',
'content/dist/rhel8/8.8/ppc64le/baseos/debug',
'content/dist/rhel8/8.8/ppc64le/baseos/os',
'content/dist/rhel8/8.8/ppc64le/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/aarch64/baseos/debug',
'content/dist/rhel8/8.9/aarch64/baseos/os',
'content/dist/rhel8/8.9/aarch64/baseos/source/SRPMS',
'content/dist/rhel8/8.9/ppc64le/baseos/debug',
'content/dist/rhel8/8.9/ppc64le/baseos/os',
'content/dist/rhel8/8.9/ppc64le/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/aarch64/baseos/debug',
'content/dist/rhel8/8/aarch64/baseos/os',
'content/dist/rhel8/8/aarch64/baseos/source/SRPMS',
'content/dist/rhel8/8/ppc64le/baseos/debug',
'content/dist/rhel8/8/ppc64le/baseos/os',
'content/dist/rhel8/8/ppc64le/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':'grub2-common-2.02-156.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-aa64-2.02-156.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-aa64-cdboot-2.02-156.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-aa64-modules-2.02-156.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-ia32-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-ia32-cdboot-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-ia32-modules-2.02-156.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-x64-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-x64-cdboot-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-x64-modules-2.02-156.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-pc-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-pc-modules-2.02-156.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-ppc64le-2.02-156.el8', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-ppc64le-modules-2.02-156.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-2.02-156.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-2.02-156.el8', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-efi-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-2.02-156.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-2.02-156.el8', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-2.02-156.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-2.02-156.el8', 'cpu':'ppc64le', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-2.02-156.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
]
}
];
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, 'grub2-common / grub2-efi-aa64 / grub2-efi-aa64-cdboot / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | grub2-tools-minimal | p-cpe:/a:redhat:enterprise_linux:grub2-tools-minimal |
redhat | enterprise_linux | grub2-tools | p-cpe:/a:redhat:enterprise_linux:grub2-tools |
redhat | enterprise_linux | grub2-efi-x64-cdboot | p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-cdboot |
redhat | enterprise_linux | grub2-efi-aa64 | p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64 |
redhat | enterprise_linux | grub2-efi-ia32-modules | p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-modules |
redhat | enterprise_linux | grub2-pc-modules | p-cpe:/a:redhat:enterprise_linux:grub2-pc-modules |
redhat | enterprise_linux | grub2-tools-extra | p-cpe:/a:redhat:enterprise_linux:grub2-tools-extra |
redhat | enterprise_linux | grub2-efi-aa64-modules | p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-modules |
redhat | enterprise_linux | 8 | cpe:/o:redhat:enterprise_linux:8 |
redhat | enterprise_linux | grub2-common | p-cpe:/a:redhat:enterprise_linux:grub2-common |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4692
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4693
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-1048
www.nessus.org/u?99ff6172
www.nessus.org/u?dfa83822
access.redhat.com/errata/RHSA-2024:3184
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=2236613
bugzilla.redhat.com/show_bug.cgi?id=2238343
bugzilla.redhat.com/show_bug.cgi?id=2256827
issues.redhat.com/browse/RHEL-4314
issues.redhat.com/browse/RHEL-4343
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
32.6%