Linux Distros Unpatched Vulnerability : CVE-2024-50182

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

include('compat.inc');

if (description)
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  script_id(231779);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/21");

  script_cve_id("CVE-2024-50182");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2024-50182");

  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.

  - In the Linux kernel, the following vulnerability has been resolved: secretmem: disable memfd_secret() if
    arch cannot set direct map Return -ENOSYS from memfd_secret() syscall if !can_set_direct_map(). This is
    the case for example on some arm64 configurations, where marking 4k PTEs in the direct map not present can
    only be done if the direct map is set up at 4k granularity in the first place (as ARM's break-before-make
    semantics do not easily allow breaking apart large/gigantic pages). More precisely, on arm64 systems with
    !can_set_direct_map(), set_direct_map_invalid_noflush() is a no-op, however it returns success (0) instead
    of an error. This means that memfd_secret will seemingly work (e.g. syscall succeeds, you can mmap the
    fd and fault in pages), but it does not actually achieve its goal of removing its memory from the direct
    map. Note that with this patch, memfd_secret() will start erroring on systems where can_set_direct_map()
    returns false (arm64 with CONFIG_RODATA_FULL_DEFAULT_ENABLED=n, CONFIG_DEBUG_PAGEALLOC=n and
    CONFIG_KFENCE=n), but that still seems better than the current silent failure. Since
    CONFIG_RODATA_FULL_DEFAULT_ENABLED defaults to 'y', most arm64 systems actually have a working
    memfd_secret() and aren't be affected. From going through the iterations of the original memfd_secret
    patch series, it seems that disabling the syscall in these scenarios was the intended behavior [1]
    (preferred over having set_direct_map_invalid_noflush return an error as that would result in SIGBUSes at
    page-fault time), however the check for it got dropped between v16 [2] and v17 [3], when secretmem moved
    away from CMA allocations. [1]: https://lore.kernel.org/lkml/[email protected]/ [2]:
    https://lore.kernel.org/lkml/[email protected]/#t [3]:
    https://lore.kernel.org/lkml/[email protected]/ (CVE-2024-50182)

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-2024-50182");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2024-50182");
  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:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-50182");

  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:"2024/11/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/06");

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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/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 = {
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    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "linux-hwe-edge"}
        ]
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    "package_manager": "dpkg-l",
    "constraints": [
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        "release": "18.04",
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    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "kernel-rt"},
          {"reference": "kernel-rt-core"},
          {"reference": "kernel-rt-debug"},
          {"reference": "kernel-rt-debug-core"},
          {"reference": "kernel-rt-debug-devel"},
          {"reference": "kernel-rt-debug-devel-matched"},
          {"reference": "kernel-rt-debug-kvm"},
          {"reference": "kernel-rt-debug-modules"},
          {"reference": "kernel-rt-debug-modules-core"},
          {"reference": "kernel-rt-debug-modules-extra"},
          {"reference": "kernel-rt-debug-modules-internal"},
          {"reference": "kernel-rt-debug-modules-partner"},
          {"reference": "kernel-rt-devel"},
          {"reference": "kernel-rt-devel-matched"},
          {"reference": "kernel-rt-kvm"},
          {"reference": "kernel-rt-modules"},
          {"reference": "kernel-rt-modules-core"},
          {"reference": "kernel-rt-modules-extra"},
          {"reference": "kernel-rt-modules-internal"},
          {"reference": "kernel-rt-modules-partner"},
          {"reference": "kernel-rt-selftests-internal"}
        ]
      }
    ]
  }
};

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');
}