nginx 1.1.19 < 1.28.3 / 1.29.x < 1.29.7 Multiple Vulnerabilities in ngx_http_mp4_module

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(306675);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/17");

  script_cve_id("CVE-2026-27784", "CVE-2026-32647");

  script_name(english:"nginx 1.1.19 < 1.28.3 / 1.29.x < 1.29.7 Multiple Vulnerabilities in ngx_http_mp4_module");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The installed version of nginx is 1.1.19 prior to 1.28.3, or 1.29.x prior to 1.29.7. It is, therefore, affected by
multiple vulnerabilities :

  - The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module,
    which might allow an attacker to over-read or over-write NGINX worker memory resulting in its
    termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source if it
    is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file.
    Additionally, the attack is possible only if an attacker can trigger the processing of a specially
    crafted MP4 file with the ngx_http_mp4_module module. Note: Software versions which have reached End
    of Technical Support (EoTS) are not evaluated. (CVE-2026-27784)

  - NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_mp4_module module, which might
    allow an attacker to trigger a buffer over-read or over-write to the NGINX worker memory resulting in
    its termination or possibly code execution, using a specially crafted MP4 file. This issue affects
    NGINX Open Source and NGINX Plus if it is built with the ngx_http_mp4_module module and the mp4
    directive is used in the configuration file. Additionally, the attack is possible only if an attacker
    can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. Note:
    Software versions which have reached End of Technical Support (EoTS) are not evaluated.
    (CVE-2026-32647)

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://my.f5.com/manage/s/article/K000160364");
  script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K000160366");
  script_set_attribute(attribute:"see_also", value:"https://nginx.org/en/security_advisories.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to nginx 1.28.3 / 1.29.7 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  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:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-32647");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-27784");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-27784");

  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:"2026/03/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:nginx:nginx");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("nginx_detect.nasl", "nginx_nix_installed.nbin");
  script_require_keys("Settings/ParanoidReport", "installed_sw/nginx");

  exit(0);
}

include('vcf.inc');
include('http.inc');

# ngx_http_mp4_module is not compiled by default
if (report_paranoia < 2)
  audit(AUDIT_PARANOID);

var appname = 'nginx';
get_install_count(app_name:appname, exit_if_zero:TRUE);

var app_info = vcf::combined_get_app_info(app:appname);
vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
  { 'min_version' : '1.1.19', 'fixed_version' : '1.28.3' },
  { 'min_version' : '1.29.0', 'fixed_version' : '1.29.7' }
];
vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);