Debian DLA-3203-1 : nginx - 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-3203. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(168171);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/02");

  script_cve_id("CVE-2021-3618", "CVE-2022-41741", "CVE-2022-41742");
  script_xref(name:"IAVA", value:"2022-A-0440-S");

  script_name(english:"Debian DLA-3203-1 : nginx - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-3203 advisory.

  - ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing
    different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A
    MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one
    subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-
    protocol attacks may be possible where the behavior of one protocol service may compromise the other at
    the application layer. (CVE-2021-3618)

  - NGINX Open Source before versions 1.23.2 and 1.22.1, NGINX Open Source Subscription before versions R2 P1
    and R1 P1, and NGINX Plus before versions R27 P1 and R26 P1 have a vulnerability in the module
    ngx_http_mp4_module that might allow a local attacker to corrupt NGINX worker memory, resulting in its
    termination or potential other impact using a specially crafted audio or video file. The issue affects
    only NGINX products that are built with the ngx_http_mp4_module, when the mp4 directive is used in the
    configuration file. Further, the attack is possible only if an attacker can trigger processing of a
    specially crafted audio or video file with the module ngx_http_mp4_module. (CVE-2022-41741)

  - NGINX Open Source before versions 1.23.2 and 1.22.1, NGINX Open Source Subscription before versions R2 P1
    and R1 P1, and NGINX Plus before versions R27 P1 and R26 P1 have a vulnerability in the module
    ngx_http_mp4_module that might allow a local attacker to cause a worker process crash, or might result in
    worker process memory disclosure by using a specially crafted audio or video file. The issue affects only
    NGINX products that are built with the module ngx_http_mp4_module, when the mp4 directive is used in the
    configuration file. Further, the attack is possible only if an attacker can trigger processing of a
    specially crafted audio or video file with the module ngx_http_mp4_module. (CVE-2022-41742)

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991328");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/nginx");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-3203");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3618");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-41741");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-41742");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/nginx");
  script_set_attribute(attribute:"solution", value:
"Upgrade the nginx packages.

For Debian 10 buster, these problems have been fixed in version 1.14.2-2+deb10u5.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/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:L/PR:L/UI:N/S:U/C:H/I:H/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-2021-3618");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-41741");

  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:"2021/10/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/11/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/11/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-auth-pam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-cache-purge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-dav-ext");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-echo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-fancyindex");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-geoip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-headers-more-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-image-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-lua");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-ndk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-subs-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-uploadprogress");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-upstream-fair");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-http-xslt-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-mail");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-nchan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-rtmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnginx-mod-stream");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx-full");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nginx-light");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 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': 'libnginx-mod-http-auth-pam', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-cache-purge', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-dav-ext', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-echo', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-fancyindex', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-geoip', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-headers-more-filter', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-image-filter', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-lua', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-ndk', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-perl', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-subs-filter', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-uploadprogress', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-upstream-fair', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-http-xslt-filter', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-mail', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-nchan', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-rtmp', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'libnginx-mod-stream', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'nginx', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'nginx-common', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'nginx-doc', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'nginx-extras', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'nginx-full', 'reference': '1.14.2-2+deb10u5'},
    {'release': '10.0', 'prefix': 'nginx-light', 'reference': '1.14.2-2+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_WARNING,
    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, 'libnginx-mod-http-auth-pam / libnginx-mod-http-cache-purge / etc');
}