Oracle Linux 8 : container-tools:ol8 (ELSA-2020-0348)

##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2020-0348.
##

include('compat.inc');

if (description)
{
  script_id(140033);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/09/22");

  script_cve_id("CVE-2020-7039");

  script_name(english:"Oracle Linux 8 : container-tools:ol8 (ELSA-2020-0348)");

  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 8 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2020-0348 advisory.

  - tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC
    DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which
    can lead to a DoS or potential execute arbitrary code. (CVE-2020-7039)

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-2020-0348.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:H/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-7039");

  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:"2020/01/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:buildah");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:buildah-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:cockpit-podman");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:conmon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:container-selinux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:containernetworking-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:containers-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:fuse-overlayfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:podman");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:podman-docker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:podman-manpages");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:podman-remote");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:podman-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python-podman-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:runc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:skopeo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:skopeo-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:slirp4netns");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:toolbox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:udica");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2021 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('audit.inc');
include('global_settings.inc');
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');
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');
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');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 8', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

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);

module_ver = get_kb_item('Host/RedHat/appstream/container-tools');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module container-tools:ol8');
if ('ol8' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module container-tools:' + module_ver);

appstreams = {
    'container-tools:ol8': [
      {'reference':'buildah-1.11.6-4.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'buildah-1.11.6-4.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'buildah-tests-1.11.6-4.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'buildah-tests-1.11.6-4.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'cockpit-podman-11-1.module+el8.1.1+5502+fbec5cc6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'conmon-2.0.6-1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'conmon-2.0.6-1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'container-selinux-2.124.0-1.module+el8.1.1+5502+fbec5cc6', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'containernetworking-plugins-0.8.3-4.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'containernetworking-plugins-0.8.3-4.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'containers-common-0.1.40-8.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'containers-common-0.1.40-8.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'fuse-overlayfs-0.7.2-1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'fuse-overlayfs-0.7.2-1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-docker-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-manpages-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-remote-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-remote-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-tests-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'podman-tests-1.6.4-2.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python-podman-api-1.2.0-0.2.gitd0a45fe.module+el8.1.1+5502+fbec5cc6', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'runc-1.0.0-64.rc9.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'rc_precedence':TRUE},
      {'reference':'runc-1.0.0-64.rc9.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'rc_precedence':TRUE},
      {'reference':'skopeo-0.1.40-8.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'skopeo-0.1.40-8.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'skopeo-tests-0.1.40-8.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'skopeo-tests-0.1.40-8.0.1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'slirp4netns-0.4.2-2.git21fdece.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'slirp4netns-0.4.2-2.git21fdece.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'toolbox-0.0.4-1.module+el8.1.1+5502+fbec5cc6', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'toolbox-0.0.4-1.module+el8.1.1+5502+fbec5cc6', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'udica-0.2.1-2.module+el8.1.1+5502+fbec5cc6', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
};

flag = 0;
appstreams_found = 0;
foreach module (keys(appstreams)) {
  appstream = NULL;
  appstream_name = NULL;
  appstream_version = NULL;
  appstream_split = split(module, sep:':', keep:FALSE);
  if (!empty_or_null(appstream_split)) {
    appstream_name = appstream_split[0];
    appstream_version = appstream_split[1];
    if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/RedHat/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach package_array ( appstreams[module] ) {
      reference = NULL;
      release = NULL;
      sp = NULL;
      cpu = NULL;
      el_string = NULL;
      rpm_spec_vers_cmp = NULL;
      epoch = NULL;
      allowmaj = 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['rc_precedence'])) rc_precedence = package_array['rc_precedence'];
      if (reference && release) {
        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, rc_precedence:rc_precedence)) flag++;
      }
    }
  }
}

if (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module container-tools:ol8');

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'buildah / buildah-tests / cockpit-podman / etc');
}