Unity Linux 20.1070a Security Update: kernel (UTSA-2025-986415)

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

include('compat.inc');

if (description)
{
  script_id(268760);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2022-49505");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-986415)");

  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-2025-986415 advisory.

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

    NFC: NULL out the dev->rfkill to prevent UAF

    Commit 3e3b5dfcd16a (NFC: reorder the logic in nfc_{un,}register_device)
    assumes the device_is_registered() in function nfc_dev_up() will help
    to check when the rfkill is unregistered. However, this check only
    take effect when device_del(&dev->dev) is done in nfc_unregister_device().
    Hence, the rfkill object is still possible be dereferenced.

    The crash trace in latest kernel (5.18-rc2):

    [   68.760105] ==================================================================
    [   68.760330] BUG: KASAN: use-after-free in __lock_acquire+0x3ec1/0x6750
    [   68.760756] Read of size 8 at addr ffff888009c93018 by task fuzz/313
    [   68.760756]
    [   68.760756] CPU: 0 PID: 313 Comm: fuzz Not tainted 5.18.0-rc2 #4
    [   68.760756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
    rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
    [   68.760756] Call Trace:
    [   68.760756]  <TASK>
    [   68.760756]  dump_stack_lvl+0x57/0x7d
    [   68.760756]  print_report.cold+0x5e/0x5db
    [   68.760756]  ? __lock_acquire+0x3ec1/0x6750
    [   68.760756]  kasan_report+0xbe/0x1c0
    [   68.760756]  ? __lock_acquire+0x3ec1/0x6750
    [   68.760756]  __lock_acquire+0x3ec1/0x6750
    [   68.760756]  ? lockdep_hardirqs_on_prepare+0x410/0x410
    [   68.760756]  ? register_lock_class+0x18d0/0x18d0
    [   68.760756]  lock_acquire+0x1ac/0x4f0
    [   68.760756]  ? rfkill_blocked+0xe/0x60
    [   68.760756]  ? lockdep_hardirqs_on_prepare+0x410/0x410
    [   68.760756]  ? mutex_lock_io_nested+0x12c0/0x12c0
    [   68.760756]  ? nla_get_range_signed+0x540/0x540
    [   68.760756]  ? _raw_spin_lock_irqsave+0x4e/0x50
    [   68.760756]  _raw_spin_lock_irqsave+0x39/0x50
    [   68.760756]  ? rfkill_blocked+0xe/0x60
    [   68.760756]  rfkill_blocked+0xe/0x60
    [   68.760756]  nfc_dev_up+0x84/0x260
    [   68.760756]  nfc_genl_dev_up+0x90/0xe0
    [   68.760756]  genl_family_rcv_msg_doit+0x1f4/0x2f0
    [   68.760756]  ? genl_family_rcv_msg_attrs_parse.constprop.0+0x230/0x230
    [   68.760756]  ? security_capable+0x51/0x90
    [   68.760756]  genl_rcv_msg+0x280/0x500
    [   68.760756]  ? genl_get_cmd+0x3c0/0x3c0
    [   68.760756]  ? lock_acquire+0x1ac/0x4f0
    [   68.760756]  ? nfc_genl_dev_down+0xe0/0xe0
    [   68.760756]  ? lockdep_hardirqs_on_prepare+0x410/0x410
    [   68.760756]  netlink_rcv_skb+0x11b/0x340
    [   68.760756]  ? genl_get_cmd+0x3c0/0x3c0
    [   68.760756]  ? netlink_ack+0x9c0/0x9c0
    [   68.760756]  ? netlink_deliver_tap+0x136/0xb00
    [   68.760756]  genl_rcv+0x1f/0x30
    [   68.760756]  netlink_unicast+0x430/0x710
    [   68.760756]  ? memset+0x20/0x40
    [   68.760756]  ? netlink_attachskb+0x740/0x740
    [   68.760756]  ? __build_skb_around+0x1f4/0x2a0
    [   68.760756]  netlink_sendmsg+0x75d/0xc00
    [   68.760756]  ? netlink_unicast+0x710/0x710
    [   68.760756]  ? netlink_unicast+0x710/0x710
    [   68.760756]  sock_sendmsg+0xdf/0x110
    [   68.760756]  __sys_sendto+0x19e/0x270
    [   68.760756]  ? __ia32_sys_getpeername+0xa0/0xa0
    [   68.760756]  ? fd_install+0x178/0x4c0
    [   68.760756]  ? fd_install+0x195/0x4c0
    [   68.760756]  ? kernel_fpu_begin_mask+0x1c0/0x1c0
    [   68.760756]  __x64_sys_sendto+0xd8/0x1b0
    [   68.760756]  ? lockdep_hardirqs_on+0xbf/0x130
    [   68.760756]  ? syscall_enter_from_user_mode+0x1d/0x50
    [   68.760756]  do_syscall_64+0x3b/0x90
    [   68.760756]  entry_SYSCALL_64_after_hwframe+0x44/0xae
    [   68.760756] RIP: 0033:0x7f67fb50e6b3
    ...
    [   68.760756] RSP: 002b:00007f67fa91fe90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
    [   68.760756] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f67fb50e6b3
    [   68.760756] RDX: 000000000000001c RSI: 0000559354603090 RDI: 0000000000000003
    [   68.760756] RBP: 00007f67fa91ff00 R08: 00007f67fa91fedc R09: 000000000000000c
    [   68.760756] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe824d496e
    [   68.760756] R13: 00007ffe824d496f R14: 00007f67fa120000 R15: 0000000000000003

    [   68.760756]  </TASK>
    [   68.760756]
    [   68.760756] Allocated by task 279:
    [   68.760756]  kasan_save_stack+0x1e/0x40
    [
    ---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-2025-986415
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?be2136ef");
  # https://lore.kernel.org/linux-cve-announce/2025022608-CVE-2022-49505-302d@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?90c916ce");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-49505");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/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-2022-49505");

  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:"2025/02/26");
  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_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');
}