Unity Linux 20.1070a Security Update: kernel (UTSA-2025-986496)

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

include('compat.inc');

if (description)
{
  script_id(268187);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2021-47284");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-986496)");

  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-2025-986496 advisory.

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

    isdn: mISDN: netjet: Fix crash in nj_probe:

    'nj_setup' in netjet.c might fail with -EIO and in this case
    'card->irq' is initialized and is bigger than zero. A subsequent call to
    'nj_release' will free the irq that has not been requested.

    Fix this bug by deleting the previous assignment to 'card->irq' and just
    keep the assignment before 'request_irq'.

    The KASAN's log reveals it:

    [    3.354615 ] WARNING: CPU: 0 PID: 1 at kernel/irq/manage.c:1826
    free_irq+0x100/0x480
    [    3.355112 ] Modules linked in:
    [    3.355310 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
    5.13.0-rc1-00144-g25a1298726e #13
    [    3.355816 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
    rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
    [    3.356552 ] RIP: 0010:free_irq+0x100/0x480
    [    3.356820 ] Code: 6e 08 74 6f 4d 89 f4 e8 5e ac 09 00 4d 8b 74 24 18
    4d 85 f6 75 e3 e8 4f ac 09 00 8b 75 c8 48 c7 c7 78 c1 2e 85 e8 e0 cf f5
    ff <0f> 0b 48 8b 75 c0 4c 89 ff e8 72 33 0b 03 48 8b 43 40 4c 8b a0 80
    [    3.358012 ] RSP: 0000:ffffc90000017b48 EFLAGS: 00010082
    [    3.358357 ] RAX: 0000000000000000 RBX: ffff888104dc8000 RCX:
    0000000000000000
    [    3.358814 ] RDX: ffff8881003c8000 RSI: ffffffff8124a9e6 RDI:
    00000000ffffffff
    [    3.359272 ] RBP: ffffc90000017b88 R08: 0000000000000000 R09:
    0000000000000000
    [    3.359732 ] R10: ffffc900000179f0 R11: 0000000000001d04 R12:
    0000000000000000
    [    3.360195 ] R13: ffff888107dc6000 R14: ffff888107dc6928 R15:
    ffff888104dc80a8
    [    3.360652 ] FS:  0000000000000000(0000) GS:ffff88817bc00000(0000)
    knlGS:0000000000000000
    [    3.361170 ] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [    3.361538 ] CR2: 0000000000000000 CR3: 000000000582e000 CR4:
    00000000000006f0
    [    3.362003 ] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
    0000000000000000
    [    3.362175 ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
    0000000000000400
    [    3.362175 ] Call Trace:
    [    3.362175 ]  nj_release+0x51/0x1e0
    [    3.362175 ]  nj_probe+0x450/0x950
    [    3.362175 ]  ? pci_device_remove+0x110/0x110
    [    3.362175 ]  local_pci_probe+0x45/0xa0
    [    3.362175 ]  pci_device_probe+0x12b/0x1d0
    [    3.362175 ]  really_probe+0x2a9/0x610
    [    3.362175 ]  driver_probe_device+0x90/0x1d0
    [    3.362175 ]  ? mutex_lock_nested+0x1b/0x20
    [    3.362175 ]  device_driver_attach+0x68/0x70
    [    3.362175 ]  __driver_attach+0x124/0x1b0
    [    3.362175 ]  ? device_driver_attach+0x70/0x70
    [    3.362175 ]  bus_for_each_dev+0xbb/0x110
    [    3.362175 ]  ? rdinit_setup+0x45/0x45
    [    3.362175 ]  driver_attach+0x27/0x30
    [    3.362175 ]  bus_add_driver+0x1eb/0x2a0
    [    3.362175 ]  driver_register+0xa9/0x180
    [    3.362175 ]  __pci_register_driver+0x82/0x90
    [    3.362175 ]  ? w6692_init+0x38/0x38
    [    3.362175 ]  nj_init+0x36/0x38
    [    3.362175 ]  do_one_initcall+0x7f/0x3d0
    [    3.362175 ]  ? rdinit_setup+0x45/0x45
    [    3.362175 ]  ? rcu_read_lock_sched_held+0x4f/0x80
    [    3.362175 ]  kernel_init_freeable+0x2aa/0x301
    [    3.362175 ]  ? rest_init+0x2c0/0x2c0
    [    3.362175 ]  kernel_init+0x18/0x190
    [    3.362175 ]  ? rest_init+0x2c0/0x2c0
    [    3.362175 ]  ? rest_init+0x2c0/0x2c0
    [    3.362175 ]  ret_from_fork+0x1f/0x30
    [    3.362175 ] Kernel panic - not syncing: panic_on_warn set ...
    [    3.362175 ] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
    5.13.0-rc1-00144-g25a1298726e #13
    [    3.362175 ] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
    rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
    [    3.362175 ] Call Trace:
    [    3.362175 ]  dump_stack+0xba/0xf5
    [    3.362175 ]  ? free_irq+0x100/0x480
    [    3.362175 ]  panic+0x15a/0x3f2
    [    3.362175 ]  ? __warn+0xf2/0x150
    [    3.362175 ]  ? free_irq+0x100/0x480
    [    3.362175 ]  __warn+0x108/0x150
    [    3.362175 ]  ? free_irq+0x100/0x480
    [    3.362175 ]  report_bug+0x119/0x1c0
    [    3.362175 ]  handle_bug+0x3b/0x80
    [    3.362175 ]  exc_invalid_op+0x18/0x70
    [    3.362175 ]  asm_exc_invalid_op+0x12/0x20
    [    3.362175 ] RIP: 0010:free_irq+0x100
    ---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-2025-986496
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f64bcb82");
  # https://lore.kernel.org/linux-cve-announce/2024052154-CVE-2021-47284-c8f5@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4586617d");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2021-47284");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:H/PR:L/UI:N/S:U/C:N/I:N/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-2021-47284");

  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:"2024/05/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/07");

  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-4.19.0-91.82.190.002', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.002', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.002', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.002', '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_HOLE,
      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');
}