Debian dla-4829 : rails - 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-4829. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(364213);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/09");

  script_cve_id(
    "CVE-2026-33168",
    "CVE-2026-33169",
    "CVE-2026-33170",
    "CVE-2026-33173",
    "CVE-2026-33176",
    "CVE-2026-33195",
    "CVE-2026-33202",
    "CVE-2026-66066"
  );

  script_name(english:"Debian dla-4829 : rails - 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 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4829 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4829-1                [email protected]
    https://www.debian.org/lts/security/                        Simon Quigley
    October 08, 2026                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : rails
    Version        : 2:6.1.7.10+dfsg-1~deb12u3
    CVE ID         : CVE-2026-33168 CVE-2026-33169 CVE-2026-33170 CVE-2026-33173
                     CVE-2026-33176 CVE-2026-33195 CVE-2026-33202 CVE-2026-66066
    Debian Bug     : 1132035 1143080

    Multiple security issues were discovered in the Rails web framework
    which could result in cross-site scripting, denial of service, path
    traversal, or the execution of arbitrary code.

    CVE-2026-33168

        In Action View, tag helpers skipped escaping when an HTML attribute
        name was blank, which could allow cross-site scripting. Blank
        attribute names are now dropped.

    CVE-2026-33169

        In Active Support, number_to_delimited took quadratic time on long
        digit strings, which could be used for a denial of service.

    CVE-2026-33170

        In Active Support, formatting an unsafe SafeBuffer with % marked
        the result as html_safe, which could allow cross-site scripting.
        The result now stays unsafe.

    CVE-2026-33173

        In Active Storage, a direct upload could set the analyzed and
        identified metadata keys and skip content-type detection. Those
        keys are now dropped from client-supplied metadata.

    CVE-2026-33176

        In Action View, number helpers expanded scientific notation through
        BigDecimal, so input such as 1E1000 could use excessive CPU and
        memory, leading to a denial of service.

    CVE-2026-33195

        In Active Storage, the disk service accepted keys containing ../,
        which allowed path traversal outside the storage root. Such keys now
        raise InvalidKeyError.

    CVE-2026-33202

        In Active Storage, the disk service's delete_prefixed passed the
        prefix to Dir.glob without escaping, so glob metacharacters could
        delete unintended files. Glob metacharacters are now escaped.

    CVE-2026-66066

        In Active Storage, applications that set the variant processor to
        :vips left libvips's untrusted, unfuzzed loaders enabled, which could
        allow crafted images to execute arbitrary code. The vips processor
        now blocks untrusted loaders. The default MiniMagick processor is
        not affected.

    For Debian 12 bookworm, these problems have been fixed in version
    2:6.1.7.10+dfsg-1~deb12u3.

    We recommend that you upgrade your rails packages.

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

    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/rails");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33168");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33169");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33170");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33173");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33176");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33195");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-33202");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-66066");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/rails");
  script_set_attribute(attribute:"solution", value:
"Upgrade the rails 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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-33195");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-66066");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Ruby on Rails Active Storage Vips Arbitrary File Read and Remote Code Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:rails");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-actioncable");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-actionmailbox");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-actionmailer");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-actionpack");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-actiontext");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-actionview");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-activejob");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-activemodel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-activerecord");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-activestorage");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-activesupport");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-rails");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-railties");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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_info2.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:"^(12)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0', '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': '12.0', 'prefix': 'rails', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-actioncable', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-actionmailbox', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-actionmailer', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-actionpack', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-actiontext', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-actionview', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-activejob', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-activemodel', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-activerecord', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-activestorage', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-activesupport', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-rails', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'},
    {'release': '12.0', 'prefix': 'ruby-railties', 'reference': '2:6.1.7.10+dfsg-1~deb12u3'}
];

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, 'rails / ruby-actioncable / ruby-actionmailbox / ruby-actionmailer / etc');
}