The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:1967-1 advisory.
virt-handler
service account to modify the spec of a node. (CVE-2023-26484)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 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2023:1967-1. The text itself
# is copyright (C) SUSE.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(174718);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/14");
script_cve_id("CVE-2023-26484");
script_xref(name:"SuSE", value:"SUSE-SU-2023:1967-1");
script_name(english:"SUSE SLES15 / openSUSE 15 Security Update : kubevirt, virt-api-container, virt-controller-container, virt-handler-container, virt-launcher-container, virt-libguestfs-tools-container, virt-operator-container (SUSE-SU-2023:1967-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability
as referenced in the SUSE-SU-2023:1967-1 advisory.
- KubeVirt is a virtual machine management add-on for Kubernetes. In versions 0.59.0 and prior, if a
malicious user has taken over a Kubernetes node where virt-handler (the KubeVirt node-daemon) is running,
the virt-handler service account can be used to modify all node specs. This can be misused to lure-in
system-level-privileged components which can, for instance, read all secrets on the cluster, or can exec
into pods on other nodes. This way, a compromised node can be used to elevate privileges beyond the node
until potentially having full privileged access to the whole cluster. The simplest way to exploit this,
once a user could compromise a specific node, is to set with the virt-handler service account all other
nodes to unschedulable and simply wait until system-critical components with high privileges appear on its
node. No patches are available as of time of publication. As a workaround, gatekeeper users can add a
webhook which will block the `virt-handler` service account to modify the spec of a node. (CVE-2023-26484)
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://bugzilla.suse.com/1208916");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1209359");
script_set_attribute(attribute:"see_also", value:"https://lists.suse.com/pipermail/sle-updates/2023-April/028964.html");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-26484");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/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-2023-26484");
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:"2023/03/15");
script_set_attribute(attribute:"patch_publication_date", value:"2023/04/24");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/04/25");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kubevirt-manifests");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kubevirt-virtctl");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 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/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
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/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES|SUSE)") audit(AUDIT_OS_NOT, "SUSE / openSUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+|SUSE([\d.]+))", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE / openSUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES15|SLES_SAP15|SUSE15\.4)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES15 / SLES_SAP15 / openSUSE 15', 'SUSE / openSUSE (' + os_ver + ')');
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE / openSUSE (' + os_ver + ')', cpu);
var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP4", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP15 SP4", os_ver + " SP" + service_pack);
var pkgs = [
{'reference':'kubevirt-manifests-0.54.0-150400.3.13.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
{'reference':'kubevirt-virtctl-0.54.0-150400.3.13.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
{'reference':'kubevirt-manifests-0.54.0-150400.3.13.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-containers-release-15.4', 'sles-release-15.4']},
{'reference':'kubevirt-virtctl-0.54.0-150400.3.13.1', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-containers-release-15.4', 'sles-release-15.4']},
{'reference':'kubevirt-container-disk-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-manifests-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-tests-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-virt-api-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-virt-controller-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-virt-handler-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-virt-launcher-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-virt-operator-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'kubevirt-virtctl-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']},
{'reference':'obs-service-kubevirt_containers_meta-0.54.0-150400.3.13.1', 'cpu':'x86_64', 'release':'SUSE15.4', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.4']}
];
var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var exists_check = NULL;
var rpm_spec_vers_cmp = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 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['exists_check'])) exists_check = package_array['exists_check'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (reference && _release) {
if (exists_check) {
var check_flag = 0;
foreach var check (exists_check) {
if (!rpm_exists(release:_release, rpm:check)) continue;
check_flag++;
}
if (!check_flag) continue;
}
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) 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, 'kubevirt-container-disk / kubevirt-manifests / kubevirt-tests / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | suse_linux | kubevirt-manifests | p-cpe:/a:novell:suse_linux:kubevirt-manifests |
novell | suse_linux | kubevirt-virtctl | p-cpe:/a:novell:suse_linux:kubevirt-virtctl |
novell | suse_linux | 15 | cpe:/o:novell:suse_linux:15 |