Linux Distros Unpatched Vulnerability : CVE-2026-3633

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

include('compat.inc');

if (description)
{
  script_id(301506);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/05");

  script_cve_id("CVE-2026-3633");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-3633");

  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 flaw was found in libsoup. A remote attacker, by controlling the method parameter of the
    `soup_message_new()` function, could inject arbitrary headers and additional request data. This
    vulnerability, known as CRLF (Carriage Return Line Feed) injection, occurs because the method value is not
    properly escaped during request line construction, potentially leading to HTTP request injection.
    (CVE-2026-3633)

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-2026-3633");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-3633");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-3633");
  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:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-3633");

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

  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsoup2.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsoup3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libsoup");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libsoup-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libsoup3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libsoup3-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libsoup3-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsoup2.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsoup3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsoup");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsoup-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsoup3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsoup3-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:libsoup3-doc");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  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", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/CentOS Linux-7", "Host/OS/CentOS Linux-8", "Host/OS/Debian Linux-11", "Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.10", "Host/OS/Ubuntu Linux-26.04");

  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": "gir1.2-soup-2.4"},
          {"reference": "gir1.2-soup-3.0"},
          {"reference": "libsoup-3.0-0"},
          {"reference": "libsoup-3.0-common"},
          {"reference": "libsoup-3.0-dev"},
          {"reference": "libsoup-3.0-doc"},
          {"reference": "libsoup-3.0-tests"},
          {"reference": "libsoup-gnome2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-1"},
          {"reference": "libsoup2.4-common"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"}
        ]
      }
    ]
  },
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "libsoup-gnome2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-1"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "libsoup-gnome2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-1"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "gir1.2-soup-3.0"},
          {"reference": "libsoup-2.4-1"},
          {"reference": "libsoup-3.0-0"},
          {"reference": "libsoup-3.0-common"},
          {"reference": "libsoup-3.0-dev"},
          {"reference": "libsoup-3.0-doc"},
          {"reference": "libsoup-3.0-tests"},
          {"reference": "libsoup-gnome-2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-common"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "gir1.2-soup-3.0"},
          {"reference": "libsoup-2.4-1"},
          {"reference": "libsoup-3.0-0"},
          {"reference": "libsoup-3.0-common"},
          {"reference": "libsoup-3.0-dev"},
          {"reference": "libsoup-3.0-doc"},
          {"reference": "libsoup-3.0-tests"},
          {"reference": "libsoup-gnome-2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-common"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "gir1.2-soup-3.0"},
          {"reference": "libsoup-2.4-1"},
          {"reference": "libsoup-3.0-0"},
          {"reference": "libsoup-3.0-common"},
          {"reference": "libsoup-3.0-dev"},
          {"reference": "libsoup-3.0-doc"},
          {"reference": "libsoup-3.0-tests"},
          {"reference": "libsoup-gnome-2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-common"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "gir1.2-soup-3.0"},
          {"reference": "libsoup-3.0-0"},
          {"reference": "libsoup-3.0-common"},
          {"reference": "libsoup-3.0-dev"},
          {"reference": "libsoup-3.0-doc"},
          {"reference": "libsoup-3.0-tests"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "libsoup-gnome2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-1"},
          {"reference": "libsoup2.4-dbg"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "libsoup-gnome2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-1"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "gir1.2-soup-2.4"},
          {"reference": "libsoup-gnome2.4-1"},
          {"reference": "libsoup-gnome2.4-dev"},
          {"reference": "libsoup2.4-1"},
          {"reference": "libsoup2.4-common"},
          {"reference": "libsoup2.4-dev"},
          {"reference": "libsoup2.4-doc"},
          {"reference": "libsoup2.4-tests"},
          {"reference": "libsoup3"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "gir1.2-soup-3.0"},
          {"reference": "libsoup-3.0-0"},
          {"reference": "libsoup-3.0-common"},
          {"reference": "libsoup-3.0-dev"},
          {"reference": "libsoup-3.0-doc"},
          {"reference": "libsoup-3.0-tests"},
          {"reference": "libsoup2.4"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "libsoup3"},
          {"reference": "libsoup3-devel"},
          {"reference": "libsoup3-doc"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "libsoup"},
          {"reference": "libsoup-devel"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "libsoup"},
          {"reference": "libsoup-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "libsoup"},
          {"reference": "libsoup-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "libsoup"},
          {"reference": "libsoup-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "libsoup"},
          {"reference": "libsoup-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_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}