Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-369919)

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

include('compat.inc');

if (description)
{
  script_id(266753);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2024-35899");

  script_name(english:"Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-369919)");

  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-2025-369919 advisory.

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

    netfilter: nf_tables: flush pending destroy work before exit_net release

    Similar to 2c9f0293280e (netfilter: nf_tables: flush pending destroy
    work before netlink notifier) to address a race between exit_net and
    the destroy workqueue.

    The trace below shows an element to be released via destroy workqueue
    while exit_net path (triggered via module removal) has already released
    the set that is used in such transaction.

    [ 1360.547789] BUG: KASAN: slab-use-after-free in nf_tables_trans_destroy_work+0x3f5/0x590 [nf_tables]
    [ 1360.547861] Read of size 8 at addr ffff888140500cc0 by task kworker/4:1/152465
    [ 1360.547870] CPU: 4 PID: 152465 Comm: kworker/4:1 Not tainted 6.8.0+ #359
    [ 1360.547882] Workqueue: events nf_tables_trans_destroy_work [nf_tables]
    [ 1360.547984] Call Trace:
    [ 1360.547991]  <TASK>
    [ 1360.547998]  dump_stack_lvl+0x53/0x70
    [ 1360.548014]  print_report+0xc4/0x610
    [ 1360.548026]  ? __virt_addr_valid+0xba/0x160
    [ 1360.548040]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10
    [ 1360.548054]  ? nf_tables_trans_destroy_work+0x3f5/0x590 [nf_tables]
    [ 1360.548176]  kasan_report+0xae/0xe0
    [ 1360.548189]  ? nf_tables_trans_destroy_work+0x3f5/0x590 [nf_tables]
    [ 1360.548312]  nf_tables_trans_destroy_work+0x3f5/0x590 [nf_tables]
    [ 1360.548447]  ? __pfx_nf_tables_trans_destroy_work+0x10/0x10 [nf_tables]
    [ 1360.548577]  ? _raw_spin_unlock_irq+0x18/0x30
    [ 1360.548591]  process_one_work+0x2f1/0x670
    [ 1360.548610]  worker_thread+0x4d3/0x760
    [ 1360.548627]  ? __pfx_worker_thread+0x10/0x10
    [ 1360.548640]  kthread+0x16b/0x1b0
    [ 1360.548653]  ? __pfx_kthread+0x10/0x10
    [ 1360.548665]  ret_from_fork+0x2f/0x50
    [ 1360.548679]  ? __pfx_kthread+0x10/0x10
    [ 1360.548690]  ret_from_fork_asm+0x1a/0x30
    [ 1360.548707]  </TASK>

    [ 1360.548719] Allocated by task 192061:
    [ 1360.548726]  kasan_save_stack+0x20/0x40
    [ 1360.548739]  kasan_save_track+0x14/0x30
    [ 1360.548750]  __kasan_kmalloc+0x8f/0xa0
    [ 1360.548760]  __kmalloc_node+0x1f1/0x450
    [ 1360.548771]  nf_tables_newset+0x10c7/0x1b50 [nf_tables]
    [ 1360.548883]  nfnetlink_rcv_batch+0xbc4/0xdc0 [nfnetlink]
    [ 1360.548909]  nfnetlink_rcv+0x1a8/0x1e0 [nfnetlink]
    [ 1360.548927]  netlink_unicast+0x367/0x4f0
    [ 1360.548935]  netlink_sendmsg+0x34b/0x610
    [ 1360.548944]  ____sys_sendmsg+0x4d4/0x510
    [ 1360.548953]  ___sys_sendmsg+0xc9/0x120
    [ 1360.548961]  __sys_sendmsg+0xbe/0x140
    [ 1360.548971]  do_syscall_64+0x55/0x120
    [ 1360.548982]  entry_SYSCALL_64_after_hwframe+0x55/0x5d

    [ 1360.548994] Freed by task 192222:
    [ 1360.548999]  kasan_save_stack+0x20/0x40
    [ 1360.549009]  kasan_save_track+0x14/0x30
    [ 1360.549019]  kasan_save_free_info+0x3b/0x60
    [ 1360.549028]  poison_slab_object+0x100/0x180
    [ 1360.549036]  __kasan_slab_free+0x14/0x30
    [ 1360.549042]  kfree+0xb6/0x260
    [ 1360.549049]  __nft_release_table+0x473/0x6a0 [nf_tables]
    [ 1360.549131]  nf_tables_exit_net+0x170/0x240 [nf_tables]
    [ 1360.549221]  ops_exit_list+0x50/0xa0
    [ 1360.549229]  free_exit_list+0x101/0x140
    [ 1360.549236]  unregister_pernet_operations+0x107/0x160
    [ 1360.549245]  unregister_pernet_subsys+0x1c/0x30
    [ 1360.549254]  nf_tables_module_exit+0x43/0x80 [nf_tables]
    [ 1360.549345]  __do_sys_delete_module+0x253/0x370
    [ 1360.549352]  do_syscall_64+0x55/0x120
    [ 1360.549360]  entry_SYSCALL_64_after_hwframe+0x55/0x5d

    (gdb) list *__nft_release_table+0x473
    0x1e033 is in __nft_release_table (net/netfilter/nf_tables_api.c:11354).
    11349           list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
    11350                   list_del(&flowtable->list);
    11351                   nft_use_dec(&table->use);
    11352                   nf_tables_flowtable_destroy(flowtable);
    11353           }
    11354           list_for_each_entry_safe(set, ns, &table->sets, list) {
    11355                   list_del(&set->list);
    11356                   nft_use_dec(&table->use);
    11357                   if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
    11358                           nft_map_deactivat
    ---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-2025-369919
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?84189ace");
  # https://lore.kernel.org/linux-cve-announce/2024051951-CVE-2024-35899-c56a@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ace52dca");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-35899");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:P/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:L/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-2024-35899");

  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:"2024/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/08");
  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:"^20.1050e|20.1060e|20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e / 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 && 'sw_64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1050e',
    'pkgs': [
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1060e',
    'pkgs': [
      {'reference':'kernel-5.10.0-46.34', 'sp':'1060e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.34', 'sp':'1060e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.34', 'sp':'1060e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', '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');
}