Linux Distros Unpatched Vulnerability : CVE-2026-28295

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

include('compat.inc');

if (description)
{
  script_id(300158);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/16");

  script_cve_id("CVE-2026-28295");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-28295");

  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 the FTP GVfs backend. A malicious FTP server can exploit this vulnerability by
    providing an arbitrary IP address and port in its passive mode (PASV) response. The client unconditionally
    trusts this information and attempts to connect to the specified endpoint, allowing the malicious server
    to probe for open ports accessible from the client's network. (CVE-2026-28295)

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-2026-28295");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-28295");
  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:N/A:N");
  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:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-28295");

  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:"2026/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/01");

  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:centos:centos:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  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:gvfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-afc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-afp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-archive");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-fuse");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-goa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-gphoto2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-mtp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-obexftp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-smb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:gvfs-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs-afc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs-afp");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs-devel");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs-goa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs-gphoto2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvfs-mtp");
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  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");
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  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 = {
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-backends"},
          {"reference": "gvfs-bin"},
          {"reference": "gvfs-common"},
          {"reference": "gvfs-daemons"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-libs"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-backends"},
          {"reference": "gvfs-bin"},
          {"reference": "gvfs-common"},
          {"reference": "gvfs-daemons"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-libs"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-backends"},
          {"reference": "gvfs-bin"},
          {"reference": "gvfs-common"},
          {"reference": "gvfs-daemons"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-libs"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-client"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-goa"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-mtp"},
          {"reference": "gvfs-smb"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-afc"},
          {"reference": "gvfs-archive"},
          {"reference": "gvfs-devel"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-obexftp"},
          {"reference": "gvfs-smb"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-afc"},
          {"reference": "gvfs-afp"},
          {"reference": "gvfs-archive"},
          {"reference": "gvfs-client"},
          {"reference": "gvfs-devel"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-goa"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-mtp"},
          {"reference": "gvfs-smb"},
          {"reference": "gvfs-tests"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-afc"},
          {"reference": "gvfs-afp"},
          {"reference": "gvfs-archive"},
          {"reference": "gvfs-client"},
          {"reference": "gvfs-devel"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-goa"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-mtp"},
          {"reference": "gvfs-smb"},
          {"reference": "gvfs-tests"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-afc"},
          {"reference": "gvfs-afp"},
          {"reference": "gvfs-archive"},
          {"reference": "gvfs-client"},
          {"reference": "gvfs-devel"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-goa"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-mtp"},
          {"reference": "gvfs-smb"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-afc"},
          {"reference": "gvfs-afp"},
          {"reference": "gvfs-archive"},
          {"reference": "gvfs-client"},
          {"reference": "gvfs-devel"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-goa"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-mtp"},
          {"reference": "gvfs-smb"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "gvfs"},
          {"reference": "gvfs-client"},
          {"reference": "gvfs-devel"},
          {"reference": "gvfs-fuse"},
          {"reference": "gvfs-goa"},
          {"reference": "gvfs-gphoto2"},
          {"reference": "gvfs-mtp"},
          {"reference": "gvfs-smb"}
        ]
      }
    ]
  }
};

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');
}