Debian DLA-3627-1 : redis - LTS security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3627. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(183748);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/31");

  script_cve_id("CVE-2023-45145");

  script_name(english:"Debian DLA-3627-1 : redis - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3627
advisory.

  - Redis is an in-memory database that persists on disk. On startup, Redis begins listening on a Unix socket
    before adjusting its permissions to the user-provided configuration. If a permissive umask(2) is used,
    this creates a race condition that enables, during a short period of time, another process to establish an
    otherwise unauthorized connection. This problem has existed since Redis 2.6.0-RC1. This issue has been
    addressed in Redis versions 7.2.2, 7.0.14 and 6.2.14. Users are advised to upgrade. For users unable to
    upgrade, it is possible to work around the problem by disabling Unix sockets, starting Redis with a
    restrictive umask, or storing the Unix socket file in a protected directory. (CVE-2023-45145)

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://www.debian.org/lts/security/2023/dla-3627");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-45145");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/redis");
  script_set_attribute(attribute:"solution", value:
"Upgrade the redis packages.

For Debian 10 Buster, this problem has been fixed in version 5");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:S/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/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-2023-45145");

  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:"2023/10/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis-sentinel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:redis-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian 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/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + debian_release);
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, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'redis', 'reference': '5:5.0.14-1+deb10u5'},
    {'release': '10.0', 'prefix': 'redis-sentinel', 'reference': '5:5.0.14-1+deb10u5'},
    {'release': '10.0', 'prefix': 'redis-server', 'reference': '5:5.0.14-1+deb10u5'},
    {'release': '10.0', 'prefix': 'redis-tools', 'reference': '5:5.0.14-1+deb10u5'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'redis / redis-sentinel / redis-server / redis-tools');
}