Ubuntu 20.04 LTS / 22.04 LTS / 24.10 : nginx vulnerability (USN-7285-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7285-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(216699);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/02/24");

  script_cve_id("CVE-2025-23419");
  script_xref(name:"IAVA", value:"2025-A-0086");
  script_xref(name:"USN", value:"7285-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.10 : nginx vulnerability (USN-7285-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.10 host has packages installed that are affected by a vulnerability as
referenced in the USN-7285-1 advisory.

    It was discovered that nginx incorrectly handled when multiple server blocks are configured to share the
    same IP address and port. An attacker could use this issue to use session resumption to bypass client
    certificate authentication requirements on these servers. This issue only affected Ubuntu 24.10.

    A buffer overflow and a null pointer deref was fixed in nginx rtmp module (#LP 1977718). This issue only
    affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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://ubuntu.com/security/notices/USN-7285-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N");
  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:N/A:N");
  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:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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-2025-23419");

  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:"2025/02/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/02/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/02/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-auth-pam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-cache-purge");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-dav-ext");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-echo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-fancyindex");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-geoip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-geoip2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-headers-more-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-image-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-lua");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-ndk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-subs-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-uploadprogress");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-upstream-fair");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-http-xslt-filter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-mail");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-nchan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-rtmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-stream");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-stream-geoip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnginx-mod-stream-geoip2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx-extras");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx-full");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nginx-light");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2025 Canonical, Inc. / NASL script (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '24.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.10', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-auth-pam', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-cache-purge', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-dav-ext', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-echo', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-fancyindex', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-geoip', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-geoip2', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-headers-more-filter', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-image-filter', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-lua', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-ndk', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-perl', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-subs-filter', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-uploadprogress', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-upstream-fair', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-http-xslt-filter', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-mail', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-nchan', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-rtmp', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'libnginx-mod-stream', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'nginx', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'nginx-common', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'nginx-core', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'nginx-extras', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'nginx-full', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '20.04', 'pkgname': 'nginx-light', 'pkgver': '1.18.0-0ubuntu1.7'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-auth-pam', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-cache-purge', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-dav-ext', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-echo', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-fancyindex', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-geoip', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-geoip2', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-headers-more-filter', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-image-filter', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-ndk', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-perl', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-subs-filter', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-uploadprogress', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-upstream-fair', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-http-xslt-filter', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-mail', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-nchan', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-rtmp', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-stream', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-stream-geoip', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'libnginx-mod-stream-geoip2', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'nginx', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'nginx-common', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'nginx-core', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'nginx-extras', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'nginx-full', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '22.04', 'pkgname': 'nginx-light', 'pkgver': '1.18.0-6ubuntu14.6'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-http-geoip', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-http-image-filter', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-http-perl', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-http-xslt-filter', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-mail', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-stream', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'libnginx-mod-stream-geoip', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx-common', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx-core', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx-dev', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx-extras', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx-full', 'pkgver': '1.26.0-2ubuntu3.2'},
    {'osver': '24.10', 'pkgname': 'nginx-light', 'pkgver': '1.26.0-2ubuntu3.2'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_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');
}