Linux Distros Unpatched Vulnerability : CVE-2023-28755

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(225915);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/21");

  script_cve_id("CVE-2023-28755");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2023-28755");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser
    mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing
    strings to URI objects. The fixed versions are 0.12.1, 0.11.1, 0.10.2 and 0.10.0.1. (CVE-2023-28755)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2023-28755");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-28755");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2023-28755");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-28755");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/03/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rubygem-rdoc");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rubygem-rss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rubygem-test-unit");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:rubygems-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:jruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby3.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ruby-bundled-gems");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:rubygem-abrt");
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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/CentOS Linux-8", "Host/OS/Debian Linux-12", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.04", "Host/OS/Ubuntu Linux-25.10");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "jruby"},
          {"reference": "libruby3.1"},
          {"reference": "ruby3.1"},
          {"reference": "ruby3.1-dev"},
          {"reference": "ruby3.1-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "jruby"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "jruby"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "jruby"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "jruby"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "jruby"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "jruby"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "ruby"},
          {"reference": "ruby-bundled-gems"},
          {"reference": "ruby-default-gems"},
          {"reference": "ruby-devel"},
          {"reference": "ruby-doc"},
          {"reference": "ruby-irb"},
          {"reference": "ruby-libs"},
          {"reference": "rubygem-abrt"},
          {"reference": "rubygem-abrt-doc"},
          {"reference": "rubygem-bigdecimal"},
          {"reference": "rubygem-bson"},
          {"reference": "rubygem-bson-doc"},
          {"reference": "rubygem-bundler"},
          {"reference": "rubygem-bundler-doc"},
          {"reference": "rubygem-did_you_mean"},
          {"reference": "rubygem-io-console"},
          {"reference": "rubygem-irb"},
          {"reference": "rubygem-json"},
          {"reference": "rubygem-minitest"},
          {"reference": "rubygem-mongo"},
          {"reference": "rubygem-mongo-doc"},
          {"reference": "rubygem-mysql2"},
          {"reference": "rubygem-mysql2-doc"},
          {"reference": "rubygem-net-telnet"},
          {"reference": "rubygem-openssl"},
          {"reference": "rubygem-pg"},
          {"reference": "rubygem-pg-doc"},
          {"reference": "rubygem-power_assert"},
          {"reference": "rubygem-psych"},
          {"reference": "rubygem-racc"},
          {"reference": "rubygem-rake"},
          {"reference": "rubygem-rbs"},
          {"reference": "rubygem-rdoc"},
          {"reference": "rubygem-rexml"},
          {"reference": "rubygem-rss"},
          {"reference": "rubygem-test-unit"},
          {"reference": "rubygem-typeprof"},
          {"reference": "rubygem-xmlrpc"},
          {"reference": "rubygems"},
          {"reference": "rubygems-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "ruby"},
          {"reference": "ruby-bundled-gems"},
          {"reference": "ruby-default-gems"},
          {"reference": "ruby-devel"},
          {"reference": "ruby-doc"},
          {"reference": "ruby-irb"},
          {"reference": "ruby-libs"},
          {"reference": "rubygem-abrt"},
          {"reference": "rubygem-abrt-doc"},
          {"reference": "rubygem-bigdecimal"},
          {"reference": "rubygem-bson"},
          {"reference": "rubygem-bson-doc"},
          {"reference": "rubygem-bundler"},
          {"reference": "rubygem-bundler-doc"},
          {"reference": "rubygem-did_you_mean"},
          {"reference": "rubygem-io-console"},
          {"reference": "rubygem-irb"},
          {"reference": "rubygem-json"},
          {"reference": "rubygem-minitest"},
          {"reference": "rubygem-mongo"},
          {"reference": "rubygem-mongo-doc"},
          {"reference": "rubygem-mysql2"},
          {"reference": "rubygem-mysql2-doc"},
          {"reference": "rubygem-net-telnet"},
          {"reference": "rubygem-openssl"},
          {"reference": "rubygem-pg"},
          {"reference": "rubygem-pg-doc"},
          {"reference": "rubygem-power_assert"},
          {"reference": "rubygem-psych"},
          {"reference": "rubygem-racc"},
          {"reference": "rubygem-rake"},
          {"reference": "rubygem-rbs"},
          {"reference": "rubygem-rdoc"},
          {"reference": "rubygem-rexml"},
          {"reference": "rubygem-rss"},
          {"reference": "rubygem-test-unit"},
          {"reference": "rubygem-typeprof"},
          {"reference": "rubygem-xmlrpc"},
          {"reference": "rubygems"},
          {"reference": "rubygems-devel"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}