Linux Distros Unpatched Vulnerability : CVE-2026-29057

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

include('compat.inc');

if (description)
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  script_id(302928);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/18");

  script_cve_id("CVE-2026-29057");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-29057");

  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.

  - Next.js is a React framework for building full-stack web applications. Starting in version 9.5.0 and prior
    to versions 15.5.13 and 16.1.7, when Next.js rewrites proxy traffic to an external backend, a crafted
    `DELETE`/`OPTIONS` request using `Transfer-Encoding: chunked` could trigger request boundary disagreement
    between the proxy and backend. This could allow request smuggling through rewritten routes. An attacker
    could smuggle a second request to unintended backend routes (for example, internal/admin endpoints),
    bypassing assumptions that only the configured rewrite destination/path is reachable. This does not impact
    applications hosted on providers that handle rewrites at the CDN level, such as Vercel. The vulnerability
    originated in an upstream library vendored by Next.js. It is fixed in Next.js 15.5.13 and 16.1.7 by
    updating that dependency's behavior so `content-length: 0` is added only when both `content-length` and
    `transfer-encoding` are absent, and `transfer-encoding` is no longer removed in that code path. If
    upgrading is not immediately possible, block chunked `DELETE`/`OPTIONS` requests on rewritten routes at
    the edge/proxy, and/or enforce authentication/authorization on backend routes. (CVE-2026-29057)

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-2026-29057");
  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: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:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
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  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-29057");

  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:"2026/03/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/18");

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  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/Red Hat Enterprise Linux-9");

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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/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "aspnetcore-runtime-7.0"},
          {"reference": "aspnetcore-targeting-pack-7.0"},
          {"reference": "dotnet-apphost-pack-7.0"},
          {"reference": "dotnet-host"},
          {"reference": "dotnet-hostfxr-7.0"},
          {"reference": "dotnet-runtime-7.0"},
          {"reference": "dotnet-sdk-7.0"},
          {"reference": "dotnet-sdk-7.0-source-built-artifacts"},
          {"reference": "dotnet-targeting-pack-7.0"},
          {"reference": "dotnet-templates-7.0"},
          {"reference": "dotnet7.0"},
          {"reference": "netstandard-targeting-pack-2.1"}
        ]
      }
    ]
  }
};

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');
}