Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992308)

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

include('compat.inc');

if (description)
{
  script_id(280508);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/30");

  script_cve_id("CVE-2022-50214");

  script_name(english:"Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992308)");

  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-2025-992308 advisory.

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

    coresight: Clear the connection field properly

    coresight devices track their connections (output connections) and
    hold a reference to the fwnode. When a device goes away, we walk through
    the devices on the coresight bus and make sure that the references
    are dropped. This happens both ways:
     a) For all output connections from the device, drop the reference to
        the target device via coresight_release_platform_data()

    b) Iterate over all the devices on the coresight bus and drop the
       reference to fwnode if *this* device is the target of the output
       connection, via coresight_remove_conns()->coresight_remove_match().

    However, the coresight_remove_match() doesn't clear the fwnode field,
    after dropping the reference, this causes use-after-free and
    additional refcount drops on the fwnode.

    e.g., if we have two devices, A and B, with a connection, A -> B.
    If we remove B first, B would clear the reference on B, from A
    via coresight_remove_match(). But when A is removed, it still has
    a connection with fwnode still pointing to B. Thus it tries to  drops
    the reference in coresight_release_platform_data(), raising the bells
    like :

    [   91.990153] ------------[ cut here ]------------
    [   91.990163] refcount_t: addition on 0; use-after-free.
    [   91.990212] WARNING: CPU: 0 PID: 461 at lib/refcount.c:25 refcount_warn_saturate+0xa0/0x144
    [   91.990260] Modules linked in: coresight_funnel coresight_replicator coresight_etm4x(-)
     crct10dif_ce coresight ip_tables x_tables ipv6 [last unloaded: coresight_cpu_debug]
    [   91.990398] CPU: 0 PID: 461 Comm: rmmod Tainted: G        W       T 5.19.0-rc2+ #53
    [   91.990418] Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS
    EDK II Feb  1 2019
    [   91.990434] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
    [   91.990454] pc : refcount_warn_saturate+0xa0/0x144
    [   91.990476] lr : refcount_warn_saturate+0xa0/0x144
    [   91.990496] sp : ffff80000c843640
    [   91.990509] x29: ffff80000c843640 x28: ffff800009957c28 x27: ffff80000c8439a8
    [   91.990560] x26: ffff00097eff1990 x25: ffff8000092b6ad8 x24: ffff00097eff19a8
    [   91.990610] x23: ffff80000c8439a8 x22: 0000000000000000 x21: ffff80000c8439c2
    [   91.990659] x20: 0000000000000000 x19: ffff00097eff1a10 x18: ffff80000ab99c40
    [   91.990708] x17: 0000000000000000 x16: 0000000000000000 x15: ffff80000abf6fa0
    [   91.990756] x14: 000000000000001d x13: 0a2e656572662d72 x12: 657466612d657375
    [   91.990805] x11: 203b30206e6f206e x10: 6f69746964646120 x9 : ffff8000081aba28
    [   91.990854] x8 : 206e6f206e6f6974 x7 : 69646461203a745f x6 : 746e756f63666572
    [   91.990903] x5 : ffff00097648ec58 x4 : 0000000000000000 x3 : 0000000000000027
    [   91.990952] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00080260ba00
    [   91.991000] Call trace:
    [   91.991012]  refcount_warn_saturate+0xa0/0x144
    [   91.991034]  kobject_get+0xac/0xb0
    [   91.991055]  of_node_get+0x2c/0x40
    [   91.991076]  of_fwnode_get+0x40/0x60
    [   91.991094]  fwnode_handle_get+0x3c/0x60
    [   91.991116]  fwnode_get_nth_parent+0xf4/0x110
    [   91.991137]  fwnode_full_name_string+0x48/0xc0
    [   91.991158]  device_node_string+0x41c/0x530
    [   91.991178]  pointer+0x320/0x3ec
    [   91.991198]  vsnprintf+0x23c/0x750
    [   91.991217]  vprintk_store+0x104/0x4b0
    [   91.991238]  vprintk_emit+0x8c/0x360
    [   91.991257]  vprintk_default+0x44/0x50
    [   91.991276]  vprintk+0xcc/0xf0
    [   91.991295]  _printk+0x68/0x90
    [   91.991315]  of_node_release+0x13c/0x14c
    [   91.991334]  kobject_put+0x98/0x114
    [   91.991354]  of_node_put+0x24/0x34
    [   91.991372]  of_fwnode_put+0x40/0x5c
    [   91.991390]  fwnode_handle_put+0x38/0x50
    [   91.991411]  coresight_release_platform_data+0x74/0xb0 [coresight]
    [   91.991472]  coresight_unregister+0x64/0xcc [coresight]
    [   91.991525]  etm4_remove_dev+0x64/0x78 [coresight_etm4x]
    [   91.991563]  etm4_remove_amba+0x1c/0x2c [coresight_etm4x]
    [   91.991598]  amba_remove+0x3c/0x19c
    ---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-2025-992308
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5d288bd");
  # https://lore.kernel.org/linux-cve-announce/2025061844-CVE-2022-50214-6569@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6c6c052b");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50214");
  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-2022-50214");

  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:"2025/06/18");
  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');
}