Linux Distros Unpatched Vulnerability : CVE-2026-9697

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

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  script_id(321560);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/20");

  script_cve_id("CVE-2026-9697");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-9697");

  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.

  - Impact: undici's ProxyAgent silently drops the requestTls option when configured with a SOCKS5 proxy URI
    (socks5:// or socks://). The target HTTPS connection through the SOCKS5 tunnel falls back to Node's
    default trust store, ignoring user-configured ca, cert, key, rejectUnauthorized, and servername settings.
    Applications that pin to an internal or corporate CA via requestTls.ca will, when their proxy URI is
    SOCKS5, get the default Mozilla CA bundle as the trust anchor instead. Any cert signed by any publicly-
    trusted CA for the target hostname is accepted, breaking the intended pin and enabling MITM read and
    tamper of the HTTPS exchange. Affected applications are those that use undici's ProxyAgent (or
    Socks5ProxyAgent directly) with SOCKS5 AND rely on requestTls for TLS scope restriction. The bug was
    introduced in undici 7.23.0 when SOCKS5 support was added. Patches: Upgrade to undici v7.28.0 or v8.5.0.
    Workarounds: No workaround is available within the SOCKS5 path. If a SOCKS5 proxy with TLS scope
    restriction is required and an upgrade is not yet possible, route the traffic through an HTTP-proxy
    ProxyAgent instead, where requestTls is honored correctly. (CVE-2026-9697)

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-2026-9697");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-9697");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-9697");
  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:M/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:H/PR:N/UI:N/S:U/C:H/I:H/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-2026-9697");

  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:"2026/06/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:node-undici");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nodejs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nodejs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nodejs-docs");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nodejs-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nodejs-nodemon");
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  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 = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "node-llhttp"},
          {"reference": "node-undici"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "node-undici"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "node-undici"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "node-undici"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "node-undici"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libllhttp-dev"},
          {"reference": "libllhttp9.2"},
          {"reference": "node-llhttp"},
          {"reference": "node-undici"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "nodejs24"},
          {"reference": "nodejs24-devel"},
          {"reference": "nodejs24-docs"},
          {"reference": "nodejs24-full-i18n"},
          {"reference": "nodejs24-libs"},
          {"reference": "nodejs24-npm"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "nodejs"},
          {"reference": "nodejs-devel"},
          {"reference": "nodejs-docs"},
          {"reference": "nodejs-full-i18n"},
          {"reference": "nodejs-libs"},
          {"reference": "nodejs-nodemon"},
          {"reference": "nodejs-packaging"},
          {"reference": "nodejs-packaging-bundler"},
          {"reference": "npm"},
          {"reference": "v8-12.4-devel"},
          {"reference": "v8-13.6-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "nodejs"},
          {"reference": "nodejs-devel"},
          {"reference": "nodejs-docs"},
          {"reference": "nodejs-full-i18n"},
          {"reference": "nodejs-libs"},
          {"reference": "nodejs-nodemon"},
          {"reference": "nodejs-packaging"},
          {"reference": "nodejs-packaging-bundler"},
          {"reference": "npm"},
          {"reference": "v8-12.4-devel"},
          {"reference": "v8-13.6-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "nodejs"},
          {"reference": "nodejs-docs"},
          {"reference": "nodejs-full-i18n"},
          {"reference": "nodejs-libs"},
          {"reference": "npm"}
        ]
      }
    ]
  }
};

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');
}