Debian dla-4430 : libnetsnmptrapd40 - 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-4430. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(281597);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/09");

  script_cve_id("CVE-2025-68615");
  script_xref(name:"IAVA", value:"2026-A-0019");

  script_name(english:"Debian dla-4430 : libnetsnmptrapd40 - 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 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4430
advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4430-1                [email protected]
    https://www.debian.org/lts/security/                   Andreas Henriksson
    January 01, 2026                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : net-snmp
    Version        : 5.9+dfsg-4+deb11u3
    CVE ID         : CVE-2025-68615
    Debian Bug     : 1069087 1123861

    net-snmp is a SNMP application library, tools and daemon.

    A specially crafted packet to an net-snmp snmptrapd daemon can cause a
    buffer overflow and the daemon to crash.

    (SNMP ports should never be open to public networks. There is no
    mitigation available other than ensuring ports to snmptrapd are
    appropriately firewalled or by upgrading.)

    Additionally a problem with parsing /proc/net/snmp on Linux >= 6.7 (which
    contains an additional OutTransmits field) was fixed.

    For Debian 11 bullseye, this problem has been fixed in version
    5.9+dfsg-4+deb11u3.

    We recommend that you upgrade your net-snmp packages.

    For the detailed security status of net-snmp please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/net-snmp

    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS
    Attachment:
    signature.asc
    Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/net-snmp");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-68615");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/net-snmp");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libnetsnmptrapd40 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-68615");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/12/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnetsnmptrapd40");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsnmp-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsnmp-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsnmp-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsnmp40");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:snmpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:snmptrapd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:tkmib");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 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:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', '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': '11.0', 'prefix': 'libnetsnmptrapd40', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'libsnmp-base', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'libsnmp-dev', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'libsnmp-perl', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'libsnmp40', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'snmp', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'snmpd', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'snmptrapd', 'reference': '5.9+dfsg-4+deb11u3'},
    {'release': '11.0', 'prefix': 'tkmib', 'reference': '5.9+dfsg-4+deb11u3'}
];

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_HOLE,
    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, 'libnetsnmptrapd40 / libsnmp-base / libsnmp-dev / libsnmp-perl / etc');
}