Debian dla-4132 : erlang - 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-4132. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(234684);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id(
    "CVE-2023-48795",
    "CVE-2025-26618",
    "CVE-2025-30211",
    "CVE-2025-32433"
  );
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2025/06/30");
  script_xref(name:"IAVA", value:"2025-A-0286-S");

  script_name(english:"Debian dla-4132 : erlang - 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 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4132 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4132-1                [email protected]
    https://www.debian.org/lts/security/                   Bastien Roucaris
    April 21, 2025                                https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : erlang
    Version        : 1:23.2.6+dfsg-1+deb11u2
    CVE ID         : CVE-2023-48795 CVE-2025-26618 CVE-2025-30211 CVE-2025-32433
    Debian Bug     : 1059002 1101713 1103442

    Multiple vulnerabilties were fixed in erlang.

    CVE-2023-48795 (Terrapin attack)

        The SSH transport protocol with certain OpenSSH extensions,
        allows remote attackers to bypass integrity checks such
        that some packets are omitted (from the extension
        negotiation message), and a client and server may
        consequently end up with a connection for which
        some security features have been downgraded.

    CVE-2025-26618

        The SSH transport protocol with certain OpenSSH extensions,
        allows remote attackers to bypass integrity checks such
        that some packets are omitted (from the extension
        negotiation message), and a client and server may
        consequently end up with a connection for which
        some security features have been downgraded.

    CVE-2025-30211

        The SSH transport protocol with certain OpenSSH extensions,
        allows remote attackers to bypass integrity checks such
        that some packets are omitted (from the extension
        negotiation message), and a client and server may
        consequently end up with a connection for which
        some security features have been downgraded.

    CVE-2025-32433

        A SSH server may allow an attacker to perform unauthenticated
        remote code execution (RCE). By exploiting a flaw in SSH protocol
        message handling, a malicious actor could gain unauthorized access
        to affected systems and execute arbitrary commands without valid
        credentials.

    For Debian 11 bullseye, these problems have been fixed in version
    1:23.2.6+dfsg-1+deb11u2.

    We recommend that you upgrade your erlang packages.

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

    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

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

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://security-tracker.debian.org/tracker/source-package/erlang");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-48795");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-26618");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-30211");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-32433");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/erlang");
  script_set_attribute(attribute:"solution", value:
"Upgrade the erlang packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:A");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-48795");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Erlang OTP Pre-Auth RCE Scanner and Exploit');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/12/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/04/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/04/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-asn1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-base-hipe");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-common-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-crypto");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-debugger");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-dialyzer");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-diameter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-edoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-eldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-erl-docgen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-et");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-eunit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-ftp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-inets");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-jinterface");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-manpages");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-megaco");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-mnesia");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-mode");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-nox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-observer");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-os-mon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-parsetools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-public-key");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-reltool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-runtime-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-src");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-ssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-ssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-syntax-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-tftp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-wx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-x11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:erlang-xmerl");
  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) 2025-2026 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': 'erlang', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-asn1', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-base', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-base-hipe', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-common-test', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-crypto', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-debugger', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-dev', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-dialyzer', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-diameter', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-doc', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-edoc', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-eldap', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-erl-docgen', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-et', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-eunit', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-examples', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-ftp', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-inets', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-jinterface', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-manpages', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-megaco', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-mnesia', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-mode', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-nox', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-observer', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-odbc', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-os-mon', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-parsetools', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-public-key', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-reltool', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-runtime-tools', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-snmp', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-src', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-ssh', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-ssl', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-syntax-tools', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-tftp', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-tools', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-wx', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-x11', 'reference': '1:23.2.6+dfsg-1+deb11u2'},
    {'release': '11.0', 'prefix': 'erlang-xmerl', 'reference': '1:23.2.6+dfsg-1+deb11u2'}
];

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, 'erlang / erlang-asn1 / erlang-base / erlang-base-hipe / etc');
}