NewStart CGSL MAIN 7.02 : ruby Multiple Vulnerabilities (NS-SA-2026-0108)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2026-0108. The text
# itself is copyright (C) ZTE, Inc.
##

include('compat.inc');

if (description)
{
  script_id(343568);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/08");

  script_cve_id(
    "CVE-2026-42245",
    "CVE-2026-42246",
    "CVE-2026-42257",
    "CVE-2026-42258"
  );
  script_xref(name:"IAVB", value:"2026-B-0117-S");

  script_name(english:"NewStart CGSL MAIN 7.02 : ruby Multiple Vulnerabilities (NS-SA-2026-0108)");

  script_set_attribute(attribute:"synopsis", value:
"The remote NewStart CGSL host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version MAIN 7.02, has ruby packages installed that are affected by multiple
vulnerabilities:

  - Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to
    versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent
    to the server without validation or escaping. If this string is derived from user-controlled input, it may
    contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue
    has been patched in versions 0.4.24, 0.5.14, and 0.6.4. (CVE-2026-42257)

  - Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to
    versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading
    large responses containing many string literals. A hostile server can send responses which are crafted to
    exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24,
    0.5.14, and 0.6.4. (CVE-2026-42245)

  - Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to
    versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to
    return successfully, without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24,
    0.5.14, and 0.6.4. (CVE-2026-42246)

  - Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to
    versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP
    Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions
    0.4.24, 0.5.14, and 0.6.4. (CVE-2026-42258)

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.gd-linux.com/notice/NS-SA-2026-0108");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-42245");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-42246");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-42257");
  script_set_attribute(attribute:"see_also", value:"https://security.gd-linux.com/info/CVE-2026-42258");
  script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL ruby packages. Note that updated packages may not be available yet. Please contact ZTE for
more information.");
  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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/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-2026-42257");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-42246");

  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:"2026/05/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ruby-bundled-gems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ruby-default-gems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ruby-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ruby-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:ruby-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-bigdecimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-bundler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-io-console");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-minitest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-power_assert");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-psych");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-rake");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-rbs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-rdoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-rexml");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-rss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-test-unit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygem-typeprof");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygems");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:zte:cgsl_main:rubygems-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:zte:cgsl_main:7");
  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:"NewStart CGSL 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/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");

  exit(0);
}

include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var os_release = get_kb_item('Host/ZTE-CGSL/release');
if (isnull(os_release) || os_release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, 'NewStart Carrier Grade Server Linux');

if (os_release !~ "CGSL\sMAIN\s7\.02")
  audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 7.02');

if (!get_kb_item('Host/ZTE-CGSL/rpm-list')) 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'NewStart Carrier Grade Server Linux', cpu);

var flag = 0;

var pkgs = {
  'CGSL MAIN 7.02': [
    'ruby-3.1.4-9.zncgsl7.6',
    'ruby-bundled-gems-3.1.4-9.zncgsl7.6',
    'ruby-default-gems-3.1.4-9.zncgsl7.6',
    'ruby-devel-3.1.4-9.zncgsl7.6',
    'ruby-doc-3.1.4-9.zncgsl7.6',
    'ruby-libs-3.1.4-9.zncgsl7.6',
    'rubygem-bigdecimal-3.1.1-9.zncgsl7.6',
    'rubygem-bundler-2.3.26-9.zncgsl7.6',
    'rubygem-io-console-0.5.11-9.zncgsl7.6',
    'rubygem-irb-1.4.1-9.zncgsl7.6',
    'rubygem-json-2.6.1-9.zncgsl7.6',
    'rubygem-minitest-5.15.0-9.zncgsl7.6',
    'rubygem-power_assert-2.0.1-9.zncgsl7.6',
    'rubygem-psych-4.0.4-9.zncgsl7.6',
    'rubygem-rake-13.0.6-9.zncgsl7.6',
    'rubygem-rbs-2.7.0-9.zncgsl7.6',
    'rubygem-rdoc-6.4.0-9.zncgsl7.6',
    'rubygem-rexml-3.2.5-9.zncgsl7.6',
    'rubygem-rss-0.2.9-9.zncgsl7.6',
    'rubygem-test-unit-3.5.3-9.zncgsl7.6',
    'rubygem-typeprof-0.21.3-9.zncgsl7.6',
    'rubygems-3.3.26-9.zncgsl7.6',
    'rubygems-devel-3.3.26-9.zncgsl7.6'
  ]
};
var pkg_list = pkgs[os_release];
var pkg;
foreach (pkg in pkg_list)
  if (rpm_check(reference:pkg, release:'ZTE ' + os_release, rpm_spec_vers_cmp:TRUE)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ruby');
}