Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992467)

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

include('compat.inc');

if (description)
{
  script_id(280326);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/30");

  script_cve_id("CVE-2022-50258");

  script_name(english:"Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992467)");

  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-2025-992467 advisory.

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

    wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds()

    This patch fixes a stack-out-of-bounds read in brcmfmac that occurs
    when 'buf' that is not null-terminated is passed as an argument of
    strsep() in brcmf_c_preinit_dcmds(). This buffer is filled with a firmware
    version string by memcpy() in brcmf_fil_iovar_data_get().
    The patch ensures buf is null-terminated.

    Found by a modified version of syzkaller.

    [   47.569679][ T1897] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43236b for chip BCM43236/3
    [   47.582839][ T1897] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have
    limited channels available
    [   47.601565][ T1897] ==================================================================
    [   47.602574][ T1897] BUG: KASAN: stack-out-of-bounds in strsep+0x1b2/0x1f0
    [   47.603447][ T1897] Read of size 1 at addr ffffc90001f6f000 by task kworker/0:2/1897
    [   47.604336][ T1897]
    [   47.604621][ T1897] CPU: 0 PID: 1897 Comm: kworker/0:2 Tainted: G           O      5.14.0+ #131
    [   47.605617][ T1897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
    rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
    [   47.606907][ T1897] Workqueue: usb_hub_wq hub_event
    [   47.607453][ T1897] Call Trace:
    [   47.607801][ T1897]  dump_stack_lvl+0x8e/0xd1
    [   47.608295][ T1897]  print_address_description.constprop.0.cold+0xf/0x334
    [   47.609009][ T1897]  ? strsep+0x1b2/0x1f0
    [   47.609434][ T1897]  ? strsep+0x1b2/0x1f0
    [   47.609863][ T1897]  kasan_report.cold+0x83/0xdf
    [   47.610366][ T1897]  ? strsep+0x1b2/0x1f0
    [   47.610882][ T1897]  strsep+0x1b2/0x1f0
    [   47.611300][ T1897]  ? brcmf_fil_iovar_data_get+0x3a/0xf0
    [   47.611883][ T1897]  brcmf_c_preinit_dcmds+0x995/0xc40
    [   47.612434][ T1897]  ? brcmf_c_set_joinpref_default+0x100/0x100
    [   47.613078][ T1897]  ? rcu_read_lock_sched_held+0xa1/0xd0
    [   47.613662][ T1897]  ? rcu_read_lock_bh_held+0xb0/0xb0
    [   47.614208][ T1897]  ? lock_acquire+0x19d/0x4e0
    [   47.614704][ T1897]  ? find_held_lock+0x2d/0x110
    [   47.615236][ T1897]  ? brcmf_usb_deq+0x1a7/0x260
    [   47.615741][ T1897]  ? brcmf_usb_rx_fill_all+0x5a/0xf0
    [   47.616288][ T1897]  brcmf_attach+0x246/0xd40
    [   47.616758][ T1897]  ? wiphy_new_nm+0x1703/0x1dd0
    [   47.617280][ T1897]  ? kmemdup+0x43/0x50
    [   47.617720][ T1897]  brcmf_usb_probe+0x12de/0x1690
    [   47.618244][ T1897]  ? brcmf_usbdev_qinit.constprop.0+0x470/0x470
    [   47.618901][ T1897]  usb_probe_interface+0x2aa/0x760
    [   47.619429][ T1897]  ? usb_probe_device+0x250/0x250
    [   47.619950][ T1897]  really_probe+0x205/0xb70
    [   47.620435][ T1897]  ? driver_allows_async_probing+0x130/0x130
    [   47.621048][ T1897]  __driver_probe_device+0x311/0x4b0
    [   47.621595][ T1897]  ? driver_allows_async_probing+0x130/0x130
    [   47.622209][ T1897]  driver_probe_device+0x4e/0x150
    [   47.622739][ T1897]  __device_attach_driver+0x1cc/0x2a0
    [   47.623287][ T1897]  bus_for_each_drv+0x156/0x1d0
    [   47.623796][ T1897]  ? bus_rescan_devices+0x30/0x30
    [   47.624309][ T1897]  ? lockdep_hardirqs_on_prepare+0x273/0x3e0
    [   47.624907][ T1897]  ? trace_hardirqs_on+0x46/0x160
    [   47.625437][ T1897]  __device_attach+0x23f/0x3a0
    [   47.625924][ T1897]  ? device_bind_driver+0xd0/0xd0
    [   47.626433][ T1897]  ? kobject_uevent_env+0x287/0x14b0
    [   47.627057][ T1897]  bus_probe_device+0x1da/0x290
    [   47.627557][ T1897]  device_add+0xb7b/0x1eb0
    [   47.628027][ T1897]  ? wait_for_completion+0x290/0x290
    [   47.628593][ T1897]  ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0
    [   47.629249][ T1897]  usb_set_configuration+0xf59/0x16f0
    [   47.629829][ T1897]  usb_generic_driver_probe+0x82/0xa0
    [   47.630385][ T1897]  usb_probe_device+0xbb/0x250
    [   47.630927][ T1897]  ? usb_suspend+0x590/0x590
    [   47.631397][ T1897]  really_probe+0x205/0xb70
    [   47.631855][ T1897]  ? driver_allows_async_probing+0x130/0x130
    [   47.632469][ T1897]  __driver_probe_device+0x311/0x4b0
    [   47.633002][
    ---truncated---

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-2025-992467
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7271b3f3");
  # https://lore.kernel.org/linux-cve-announce/2025091551-CVE-2022-50258-1497@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4e6086b6");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50258");
  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-2022-50258");

  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:"2021/09/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/30");

  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:"^20.1060e|20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060e / 20.1070e', '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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1060e',
    'pkgs': [
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070e', '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');
}