The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-9268 advisory.
Note that Nessus has not tested for this issue but has instead relied only on the applicationโs self-reported version number.
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2021-9268.
##
include('compat.inc');
if (description)
{
script_id(150062);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/09/22");
script_cve_id("CVE-2021-27918");
script_xref(name:"IAVB", value:"2021-B-0040-S");
script_name(english:"Oracle Linux 7 : olcne (ELSA-2021-9268)");
script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2021-9268 advisory.
- encoding/xml in Go before 1.15.9 and 1.16.x before 1.16.1 has an infinite loop if a custom TokenReader
(for xml.NewTokenDecoder) returns EOF in the middle of an element. This can occur in the Decode,
DecodeElement, or Skip method. (CVE-2021-27918)
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://linux.oracle.com/errata/ELSA-2021-9268.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-2021-27918");
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:"2021/03/11");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:conmon");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:coredns");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:cri-o");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:cri-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:etcd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:flannel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:helm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:istio");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:istio-istioctl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata-agent");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata-image");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata-ksm-throttler");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata-proxy");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata-runtime");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kata-shim");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kubeadm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kubectl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kubelet");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kubernetes-cni");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kubernetes-cni-plugins");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kubernetes-dashboard");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcne-agent");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcne-api-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcne-istio-chart");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcne-nginx");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcne-prometheus-chart");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcne-utils");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:olcnectl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:yq");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Oracle Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
var os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
var pkgs = [
{'reference':'conmon-2.0.20-4.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'conmon-2.0.20'},
{'reference':'conmon-2.0.21-4.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'3', 'exists_check':'conmon-2.0.21'},
{'reference':'coredns-1.7.0-1.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'cri-o-1.18.4-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'cri-o-1.18.'},
{'reference':'cri-tools-1.18.0-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'etcd-3.4.3-1.0.5.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'flannel-0.12.0-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'helm-3.3.4-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'istio-1.7.3-1.0.2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'istio-istioctl-1.7.3-1.0.2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-1.11.5-4.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-agent-1.11.5-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-image-1.11.5-2.2.ol7_202104281557', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-ksm-throttler-1.11.5-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-proxy-1.11.5-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-runtime-1.11.5-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kata-shim-1.11.5-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubeadm-1.18.18-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubectl-1.18.18-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubelet-1.18.18-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubernetes-cni-0.8.0-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubernetes-cni-plugins-0.8.7-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubernetes-cni-plugins-0.8.7-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kubernetes-dashboard-2.0.3-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcne-agent-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcne-api-server-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcne-istio-chart-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcne-nginx-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcne-prometheus-chart-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcne-utils-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'olcnectl-1.2.3-9.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'yq-3.4.0-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
];
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 = 'EL' + 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) {
if (exists_check) {
if (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++;
} else {
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_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, 'conmon / coredns / cri-o / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
oracle | linux | 7 | cpe:/o:oracle:linux:7 |
oracle | linux | conmon | p-cpe:/a:oracle:linux:conmon |
oracle | linux | coredns | p-cpe:/a:oracle:linux:coredns |
oracle | linux | cri-o | p-cpe:/a:oracle:linux:cri-o |
oracle | linux | cri-tools | p-cpe:/a:oracle:linux:cri-tools |
oracle | linux | etcd | p-cpe:/a:oracle:linux:etcd |
oracle | linux | flannel | p-cpe:/a:oracle:linux:flannel |
oracle | linux | helm | p-cpe:/a:oracle:linux:helm |
oracle | linux | istio | p-cpe:/a:oracle:linux:istio |
oracle | linux | istio-istioctl | p-cpe:/a:oracle:linux:istio-istioctl |