Centos 7 : runc

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(130262);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/01");

  script_cve_id("CVE-2019-5736");

  script_name(english:"Centos 7 : runc");

  script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"An update for runc is now available for CentOS 7 Extras.

The runC tool is a lightweight, portable implementation of the Open
Container Format (OCF) that provides container runtime.

A flaw was found in the way runc handled system file descriptors
when running containers. A malicious container could use this flaw to
overwrite contents of the runc binary and consequently run arbitrary
commands on the container host system. (CVE-2019-5736)");
  script_set_attribute(attribute:"see_also", value:"https://cbs.centos.org/koji/buildinfo?buildID=25136");
  script_set_attribute(attribute:"see_also", value:"https://cbs.centos.org/koji/buildinfo?buildID=25171");
  # https://www.docker.com/blog/docker-security-update-cve-2018-5736-and-container-security-best-practices/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?122b4713");
  script_set_attribute(attribute:"solution", value:
"Update the affected runc, docker, and / or docker-ce packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-5736");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Docker Container Escape Via runC Overwrite');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/02/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:runc");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  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);
release = get_kb_item("Host/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);

flag = 0;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"docker-ce-18.09.2-3.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"docker-1.13.1-92.gitb2f74b2.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"runc-1.0.0-60.dev.git2abd837.el7")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "runc / docker-ce");
}