Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992787)

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

include('compat.inc');

if (description)
{
  script_id(281336);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/31");

  script_cve_id("CVE-2022-50211");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992787)");

  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-2025-992787 advisory.

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

    md-raid10: fix KASAN warning

    There's a KASAN warning in raid10_remove_disk when running the lvm
    test lvconvert-raid-reshape.sh. We fix this warning by verifying that the
    value number is valid.

    BUG: KASAN: slab-out-of-bounds in raid10_remove_disk+0x61/0x2a0 [raid10]
    Read of size 8 at addr ffff889108f3d300 by task mdX_raid10/124682

    CPU: 3 PID: 124682 Comm: mdX_raid10 Not tainted 5.19.0-rc6 #1
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
    Call Trace:
     <TASK>
     dump_stack_lvl+0x34/0x44
     print_report.cold+0x45/0x57a
     ? __lock_text_start+0x18/0x18
     ? raid10_remove_disk+0x61/0x2a0 [raid10]
     kasan_report+0xa8/0xe0
     ? raid10_remove_disk+0x61/0x2a0 [raid10]
     raid10_remove_disk+0x61/0x2a0 [raid10]
    Buffer I/O error on dev dm-76, logical block 15344, async page read
     ? __mutex_unlock_slowpath.constprop.0+0x1e0/0x1e0
     remove_and_add_spares+0x367/0x8a0 [md_mod]
     ? super_written+0x1c0/0x1c0 [md_mod]
     ? mutex_trylock+0xac/0x120
     ? _raw_spin_lock+0x72/0xc0
     ? _raw_spin_lock_bh+0xc0/0xc0
     md_check_recovery+0x848/0x960 [md_mod]
     raid10d+0xcf/0x3360 [raid10]
     ? sched_clock_cpu+0x185/0x1a0
     ? rb_erase+0x4d4/0x620
     ? var_wake_function+0xe0/0xe0
     ? psi_group_change+0x411/0x500
     ? preempt_count_sub+0xf/0xc0
     ? _raw_spin_lock_irqsave+0x78/0xc0
     ? __lock_text_start+0x18/0x18
     ? raid10_sync_request+0x36c0/0x36c0 [raid10]
     ? preempt_count_sub+0xf/0xc0
     ? _raw_spin_unlock_irqrestore+0x19/0x40
     ? del_timer_sync+0xa9/0x100
     ? try_to_del_timer_sync+0xc0/0xc0
     ? _raw_spin_lock_irqsave+0x78/0xc0
     ? __lock_text_start+0x18/0x18
     ? _raw_spin_unlock_irq+0x11/0x24
     ? __list_del_entry_valid+0x68/0xa0
     ? finish_wait+0xa3/0x100
     md_thread+0x161/0x260 [md_mod]
     ? unregister_md_personality+0xa0/0xa0 [md_mod]
     ? _raw_spin_lock_irqsave+0x78/0xc0
     ? prepare_to_wait_event+0x2c0/0x2c0
     ? unregister_md_personality+0xa0/0xa0 [md_mod]
     kthread+0x148/0x180
     ? kthread_complete_and_exit+0x20/0x20
     ret_from_fork+0x1f/0x30
     </TASK>

    Allocated by task 124495:
     kasan_save_stack+0x1e/0x40
     __kasan_kmalloc+0x80/0xa0
     setup_conf+0x140/0x5c0 [raid10]
     raid10_run+0x4cd/0x740 [raid10]
     md_run+0x6f9/0x1300 [md_mod]
     raid_ctr+0x2531/0x4ac0 [dm_raid]
     dm_table_add_target+0x2b0/0x620 [dm_mod]
     table_load+0x1c8/0x400 [dm_mod]
     ctl_ioctl+0x29e/0x560 [dm_mod]
     dm_compat_ctl_ioctl+0x7/0x20 [dm_mod]
     __do_compat_sys_ioctl+0xfa/0x160
     do_syscall_64+0x90/0xc0
     entry_SYSCALL_64_after_hwframe+0x46/0xb0

    Last potentially related work creation:
     kasan_save_stack+0x1e/0x40
     __kasan_record_aux_stack+0x9e/0xc0
     kvfree_call_rcu+0x84/0x480
     timerfd_release+0x82/0x140
    L __fput+0xfa/0x400
     task_work_run+0x80/0xc0
     exit_to_user_mode_prepare+0x155/0x160
     syscall_exit_to_user_mode+0x12/0x40
     do_syscall_64+0x42/0xc0
     entry_SYSCALL_64_after_hwframe+0x46/0xb0

    Second to last potentially related work creation:
     kasan_save_stack+0x1e/0x40
     __kasan_record_aux_stack+0x9e/0xc0
     kvfree_call_rcu+0x84/0x480
     timerfd_release+0x82/0x140
     __fput+0xfa/0x400
     task_work_run+0x80/0xc0
     exit_to_user_mode_prepare+0x155/0x160
     syscall_exit_to_user_mode+0x12/0x40
     do_syscall_64+0x42/0xc0
     entry_SYSCALL_64_after_hwframe+0x46/0xb0

    The buggy address belongs to the object at ffff889108f3d200
     which belongs to the cache kmalloc-256 of size 256
    The buggy address is located 0 bytes to the right of
     256-byte region [ffff889108f3d200, ffff889108f3d300)

    The buggy address belongs to the physical page:
    page:000000007ef2a34c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1108f3c
    head:000000007ef2a34c order:2 compound_mapcount:0 compound_pincount:0
    flags: 0x4000000000010200(slab|head|zone=2)
    raw: 4000000000010200 0000000000000000 dead000000000001 ffff889100042b40
    raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
    page dumped because: kasan: bad access detected

    Memory state around the buggy address:
     ffff889108f3d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     ffff889108f3d280: 00 00
    ---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-2025-992787
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?87bd45fd");
  # https://lore.kernel.org/linux-cve-announce/2025061843-CVE-2022-50211-393a@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d7244f8d");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50211");
  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: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: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-2022-50211");

  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:"2022/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/31");

  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:"^20.1060a|20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060a / 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': '1060a',
    'pkgs': [
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', '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');
}