Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990462)

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

include('compat.inc');

if (description)
{
  script_id(274202);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/06");

  script_cve_id("CVE-2024-53214");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990462)");

  script_set_attribute(attribute:"synopsis", value:
"The Unity Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the
UTSA-2025-990462 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    vfio/pci: Properly hide first-in-list PCIe extended capability

    There are cases where a PCIe extended capability should be hidden from
    the user. For example, an unknown capability (i.e., capability with ID
    greater than PCI_EXT_CAP_ID_MAX) or a capability that is intentionally
    chosen to be hidden from the user.

    Hiding a capability is done by virtualizing and modifying the 'Next
    Capability Offset' field of the previous capability so it points to the
    capability after the one that should be hidden.

    The special case where the first capability in the list should be hidden
    is handled differently because there is no previous capability that can
    be modified. In this case, the capability ID and version are zeroed
    while leaving the next pointer intact. This hides the capability and
    leaves an anchor for the rest of the capability list.

    However, today, hiding the first capability in the list is not done
    properly if the capability is unknown, as struct
    vfio_pci_core_device->pci_config_map is set to the capability ID during
    initialization but the capability ID is not properly checked later when
    used in vfio_config_do_rw(). This leads to the following warning [1] and
    to an out-of-bounds access to ecap_perms array.

    Fix it by checking cap_id in vfio_config_do_rw(), and if it is greater
    than PCI_EXT_CAP_ID_MAX, use an alternative struct perm_bits for direct
    read only access instead of the ecap_perms array.

    Note that this is safe since the above is the only case where cap_id can
    exceed PCI_EXT_CAP_ID_MAX (except for the special capabilities, which
    are already checked before).

    [1]

    WARNING: CPU: 118 PID: 5329 at drivers/vfio/pci/vfio_pci_config.c:1900 vfio_pci_config_rw+0x395/0x430
    [vfio_pci_core]
    CPU: 118 UID: 0 PID: 5329 Comm: simx-qemu-syste Not tainted 6.12.0+ #1
    (snip)
    Call Trace:
     <TASK>
     ? show_regs+0x69/0x80
     ? __warn+0x8d/0x140
     ? vfio_pci_config_rw+0x395/0x430 [vfio_pci_core]
     ? report_bug+0x18f/0x1a0
     ? handle_bug+0x63/0xa0
     ? exc_invalid_op+0x19/0x70
     ? asm_exc_invalid_op+0x1b/0x20
     ? vfio_pci_config_rw+0x395/0x430 [vfio_pci_core]
     ? vfio_pci_config_rw+0x244/0x430 [vfio_pci_core]
     vfio_pci_rw+0x101/0x1b0 [vfio_pci_core]
     vfio_pci_core_read+0x1d/0x30 [vfio_pci_core]
     vfio_device_fops_read+0x27/0x40 [vfio]
     vfs_read+0xbd/0x340
     ? vfio_device_fops_unl_ioctl+0xbb/0x740 [vfio]
     ? __rseq_handle_notify_resume+0xa4/0x4b0
     __x64_sys_pread64+0x96/0xc0
     x64_sys_call+0x1c3d/0x20d0
     do_syscall_64+0x4d/0x120
     entry_SYSCALL_64_after_hwframe+0x76/0x7e

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://src.uniontech.com/#/security_advisory_detail?utsa_id=UTSA-2025-990462
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?06bf034a");
  # https://lore.kernel.org/linux-cve-announce/2024122731-CVE-2024-53214-5fbf@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3ff730d2");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-53214");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-53214");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/12/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Unity Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/UOS-Server/release", "Host/UOS-Server/rpm-list", "Host/cpu");

  exit(0);
}
include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'UOS Server' >!< os_product) audit(AUDIT_OS_NOT, 'UOS Server');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'UOS Server');
if (! preg(pattern:"^20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1070a', 'UOS Server ' + os_version);

if (!get_kb_item('Host/UOS-Server/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'amd64' >!< cpu && 'loongarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}


if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel');
}