The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2022:2110 advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Rocky Linux Security Advisory RLSA-2022:2110.
##
include('compat.inc');
if (description)
{
script_id(161348);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/06");
script_cve_id("CVE-2021-3981");
script_xref(name:"RLSA", value:"2022:2110");
script_name(english:"Rocky Linux 8 : grub2 (RLSA-2022:2110)");
script_set_attribute(attribute:"synopsis", value:
"The remote Rocky Linux host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the
RLSA-2022:2110 advisory.
- A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong
permission set allowing non privileged users to read its content. This represents a low severity
confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg.
This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no
version with the fix is currently released. (CVE-2021-3981)
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://errata.rockylinux.org/RLSA-2022:2110");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1809246");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1899903");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1914575");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2016269");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2020927");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2024170");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2048904");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2061252");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2069157");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
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:L/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-2021-3981");
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:"2022/03/10");
script_set_attribute(attribute:"patch_publication_date", value:"2022/05/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/18");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-debugsource");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-aa64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-aa64-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-aa64-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-ia32");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-ia32-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-ia32-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-x64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-x64-cdboot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-efi-x64-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-pc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-pc-modules");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-efi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-efi-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-extra");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-extra-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-minimal");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:rocky:linux:grub2-tools-minimal-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:rocky:linux:8");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Rocky Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RockyLinux/release", "Host/RockyLinux/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RockyLinux/release');
if (isnull(os_release) || 'Rocky Linux' >!< os_release) audit(AUDIT_OS_NOT, 'Rocky Linux');
var os_ver = pregmatch(pattern: "Rocky(?: Linux)? release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Rocky Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Rocky Linux 8.x', 'Rocky Linux ' + os_ver);
if (!get_kb_item('Host/RockyLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Rocky Linux', cpu);
var pkgs = [
{'reference':'grub2-common-2.02-123.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-debuginfo-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-debuginfo-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-debugsource-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-debugsource-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-aa64-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-aa64-cdboot-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-aa64-modules-2.02-123.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-ia32-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-ia32-cdboot-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-ia32-modules-2.02-123.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-x64-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-x64-cdboot-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-efi-x64-modules-2.02-123.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-pc-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-pc-modules-2.02-123.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-debuginfo-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-debuginfo-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-efi-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-efi-debuginfo-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-debuginfo-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-extra-debuginfo-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-debuginfo-2.02-123.el8', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'grub2-tools-minimal-debuginfo-2.02-123.el8', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
];
var flag = 0;
foreach var 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 = 'Rocky-' + 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 && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
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_NOTE,
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, 'grub2-common / grub2-debuginfo / grub2-debugsource / grub2-efi-aa64 / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
rocky | linux | grub2-common | p-cpe:/a:rocky:linux:grub2-common |
rocky | linux | grub2-debuginfo | p-cpe:/a:rocky:linux:grub2-debuginfo |
rocky | linux | grub2-debugsource | p-cpe:/a:rocky:linux:grub2-debugsource |
rocky | linux | grub2-efi-aa64 | p-cpe:/a:rocky:linux:grub2-efi-aa64 |
rocky | linux | grub2-efi-aa64-cdboot | p-cpe:/a:rocky:linux:grub2-efi-aa64-cdboot |
rocky | linux | grub2-efi-aa64-modules | p-cpe:/a:rocky:linux:grub2-efi-aa64-modules |
rocky | linux | grub2-efi-ia32 | p-cpe:/a:rocky:linux:grub2-efi-ia32 |
rocky | linux | grub2-efi-ia32-cdboot | p-cpe:/a:rocky:linux:grub2-efi-ia32-cdboot |
rocky | linux | grub2-efi-ia32-modules | p-cpe:/a:rocky:linux:grub2-efi-ia32-modules |
rocky | linux | grub2-efi-x64 | p-cpe:/a:rocky:linux:grub2-efi-x64 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3981
bugzilla.redhat.com/show_bug.cgi?id=1809246
bugzilla.redhat.com/show_bug.cgi?id=1899903
bugzilla.redhat.com/show_bug.cgi?id=1914575
bugzilla.redhat.com/show_bug.cgi?id=2016269
bugzilla.redhat.com/show_bug.cgi?id=2020927
bugzilla.redhat.com/show_bug.cgi?id=2024170
bugzilla.redhat.com/show_bug.cgi?id=2048904
bugzilla.redhat.com/show_bug.cgi?id=2061252
bugzilla.redhat.com/show_bug.cgi?id=2069157
errata.rockylinux.org/RLSA-2022:2110