Amazon Linux 2022 : (ALAS2022-2022-156)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2022 Security Advisory ALAS2022-2022-156.
##

include('compat.inc');

if (description)
{
  script_id(166350);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/10/20");

  script_cve_id("CVE-2022-31030", "CVE-2022-36109");

  script_name(english:"Amazon Linux 2022 :  (ALAS2022-2022-156)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2022 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2022-2022-156 advisory.

  - containerd is an open source container runtime. A bug was found in the containerd's CRI implementation
    where programs inside a container can cause the containerd daemon to consume memory without bound during
    invocation of the `ExecSync` API. This can cause containerd to consume all available memory on the
    computer, denying service to other legitimate workloads. Kubernetes and crictl can both be configured to
    use containerd's CRI implementation; `ExecSync` may be used when running probes or when executing
    processes via an exec facility. This bug has been fixed in containerd 1.6.6 and 1.5.13. Users should
    update to these versions to resolve the issue. Users unable to upgrade should ensure that only trusted
    images and commands are used. (CVE-2022-31030)

  - Moby is an open-source project created by Docker to enable software containerization. A bug was found in
    Moby (Docker Engine) where supplementary groups are not set up properly. If an attacker has direct access
    to a container and manipulates their supplementary group access, they may be able to use supplementary
    group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive
    information or gaining the ability to execute code in that container. This bug is fixed in Moby (Docker
    Engine) 20.10.18. Running containers should be stopped and restarted for the permissions to be fixed. For
    users unable to upgrade, this problem can be worked around by not using the `USER $USERNAME` Dockerfile
    instruction. Instead by calling `ENTRYPOINT [su, -, user]` the supplementary groups will be set up
    properly. (CVE-2022-36109)

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://alas.aws.amazon.com/AL2022/ALAS-2022-156.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2022-31030.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2022-36109.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update containerd --releasever=2022.0.20221019' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/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-2022-31030");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-36109");

  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:"2022/06/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:containerd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:containerd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:containerd-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:containerd-stress");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:containerd-stress-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2022");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2022")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2022", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'containerd-1.6.8-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-1.6.8-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-1.6.8-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-debuginfo-1.6.8-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-debuginfo-1.6.8-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-debuginfo-1.6.8-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-debugsource-1.6.8-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-debugsource-1.6.8-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-debugsource-1.6.8-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-stress-1.6.8-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-stress-1.6.8-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-stress-1.6.8-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-stress-debuginfo-1.6.8-1.amzn2022.0.1', 'cpu':'aarch64', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-stress-debuginfo-1.6.8-1.amzn2022.0.1', 'cpu':'i686', 'release':'AL-2022', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'containerd-stress-debuginfo-1.6.8-1.amzn2022.0.1', 'cpu':'x86_64', 'release':'AL-2022', '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 = 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, "containerd / containerd-debuginfo / containerd-debugsource / etc");
}