Linux Distros Unpatched Vulnerability : CVE-2026-6429

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

include('compat.inc');

if (description)
{
  script_id(310988);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/15");

  script_cve_id("CVE-2026-6429");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-6429");

  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.

  - When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak
    the password used for the first host to the followed-to host under certain circumstances. (CVE-2026-6429)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-6429");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-6429");
  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:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:U/RC:C");
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  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
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  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/29");

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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");
  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/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-6", "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-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04");

  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-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl3-gnutls"},
          {"reference": "libcurl3-nss"},
          {"reference": "libcurl4"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-nss-dev"},
          {"reference": "libcurl4-openssl-dev"}
        ]
      }
    ]
  },
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl3-gnutls"},
          {"reference": "libcurl3-nss"},
          {"reference": "libcurl4"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-nss-dev"},
          {"reference": "libcurl4-openssl-dev"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl3-gnutls"},
          {"reference": "libcurl3-nss"},
          {"reference": "libcurl4"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-nss-dev"},
          {"reference": "libcurl4-openssl-dev"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl3-gnutls"},
          {"reference": "libcurl3-nss"},
          {"reference": "libcurl4"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-nss-dev"},
          {"reference": "libcurl4-openssl-dev"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl3t64-gnutls"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-openssl-dev"},
          {"reference": "libcurl4t64"}
        ]
      }
    ]
  },
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "curl-udeb"},
          {"reference": "libcurl3"},
          {"reference": "libcurl3-dbg"},
          {"reference": "libcurl3-gnutls"},
          {"reference": "libcurl3-nss"},
          {"reference": "libcurl3-udeb"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-nss-dev"},
          {"reference": "libcurl4-openssl-dev"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl3"},
          {"reference": "libcurl3-dbg"},
          {"reference": "libcurl3-gnutls"},
          {"reference": "libcurl3-nss"},
          {"reference": "libcurl4-doc"},
          {"reference": "libcurl4-gnutls-dev"},
          {"reference": "libcurl4-nss-dev"},
          {"reference": "libcurl4-openssl-dev"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "clippy"},
          {"reference": "curl"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"},
          {"reference": "libcurl-minimal"},
          {"reference": "rust"},
          {"reference": "rust-analyzer"},
          {"reference": "rust-debugger-common"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rust-std-static"},
          {"reference": "rust-std-static-aarch64-unknown-none-softfloat"},
          {"reference": "rust-std-static-wasm32-unknown-unknown"},
          {"reference": "rust-std-static-wasm32-wasip1"},
          {"reference": "rust-std-static-x86_64-unknown-none"},
          {"reference": "rust-toolset"},
          {"reference": "rust-toolset-srpm-macros"},
          {"reference": "rustfmt"},
          {"reference": "s390utils"},
          {"reference": "s390utils-base"},
          {"reference": "s390utils-chreipl-fcp-mpath"},
          {"reference": "s390utils-cmsfs-fuse"},
          {"reference": "s390utils-core"},
          {"reference": "s390utils-cpacfstatsd"},
          {"reference": "s390utils-cpuplugd"},
          {"reference": "s390utils-devel"},
          {"reference": "s390utils-hmcdrvfs"},
          {"reference": "s390utils-iucvterm"},
          {"reference": "s390utils-mon_statd"},
          {"reference": "s390utils-osasnmpd"},
          {"reference": "s390utils-se-data"},
          {"reference": "s390utils-zdsfs"},
          {"reference": "s390utils-ziomon"},
          {"reference": "snphost"},
          {"reference": "trustee"},
          {"reference": "trustee-guest-components"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-6": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "6",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"},
          {"reference": "libcurl-minimal"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "curl"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"},
          {"reference": "libcurl-minimal"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "cargo"},
          {"reference": "clippy"},
          {"reference": "curl"},
          {"reference": "curl-minimal"},
          {"reference": "libcurl"},
          {"reference": "libcurl-devel"},
          {"reference": "libcurl-minimal"},
          {"reference": "rust"},
          {"reference": "rust-analysis"},
          {"reference": "rust-analyzer"},
          {"reference": "rust-debugger-common"},
          {"reference": "rust-doc"},
          {"reference": "rust-gdb"},
          {"reference": "rust-lldb"},
          {"reference": "rust-src"},
          {"reference": "rust-std-static"},
          {"reference": "rust-std-static-wasm32-unknown-unknown"},
          {"reference": "rust-std-static-wasm32-wasi"},
          {"reference": "rust-toolset"},
          {"reference": "rustfmt"},
          {"reference": "snphost"},
          {"reference": "trustee-guest-components"}
        ]
      }
    ]
  }
};

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_NOTE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}