Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990809)

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

include('compat.inc');

if (description)
{
  script_id(275069);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/12");

  script_cve_id("CVE-2023-53135");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990809)");

  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-2025-990809 advisory.

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

    riscv: Use READ_ONCE_NOCHECK in imprecise unwinding stack mode

    When CONFIG_FRAME_POINTER is unset, the stack unwinding function
    walk_stackframe randomly reads the stack and then, when KASAN is enabled,
    it can lead to the following backtrace:

    [    0.000000] ==================================================================
    [    0.000000] BUG: KASAN: stack-out-of-bounds in walk_stackframe+0xa6/0x11a
    [    0.000000] Read of size 8 at addr ffffffff81807c40 by task swapper/0
    [    0.000000]
    [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.2.0-12919-g24203e6db61f #43
    [    0.000000] Hardware name: riscv-virtio,qemu (DT)
    [    0.000000] Call Trace:
    [    0.000000] [<ffffffff80007ba8>] walk_stackframe+0x0/0x11a
    [    0.000000] [<ffffffff80099ecc>] init_param_lock+0x26/0x2a
    [    0.000000] [<ffffffff80007c4a>] walk_stackframe+0xa2/0x11a
    [    0.000000] [<ffffffff80c49c80>] dump_stack_lvl+0x22/0x36
    [    0.000000] [<ffffffff80c3783e>] print_report+0x198/0x4a8
    [    0.000000] [<ffffffff80099ecc>] init_param_lock+0x26/0x2a
    [    0.000000] [<ffffffff80007c4a>] walk_stackframe+0xa2/0x11a
    [    0.000000] [<ffffffff8015f68a>] kasan_report+0x9a/0xc8
    [    0.000000] [<ffffffff80007c4a>] walk_stackframe+0xa2/0x11a
    [    0.000000] [<ffffffff80007c4a>] walk_stackframe+0xa2/0x11a
    [    0.000000] [<ffffffff8006e99c>] desc_make_final+0x80/0x84
    [    0.000000] [<ffffffff8009a04e>] stack_trace_save+0x88/0xa6
    [    0.000000] [<ffffffff80099fc2>] filter_irq_stacks+0x72/0x76
    [    0.000000] [<ffffffff8006b95e>] devkmsg_read+0x32a/0x32e
    [    0.000000] [<ffffffff8015ec16>] kasan_save_stack+0x28/0x52
    [    0.000000] [<ffffffff8006e998>] desc_make_final+0x7c/0x84
    [    0.000000] [<ffffffff8009a04a>] stack_trace_save+0x84/0xa6
    [    0.000000] [<ffffffff8015ec52>] kasan_set_track+0x12/0x20
    [    0.000000] [<ffffffff8015f22e>] __kasan_slab_alloc+0x58/0x5e
    [    0.000000] [<ffffffff8015e7ea>] __kmem_cache_create+0x21e/0x39a
    [    0.000000] [<ffffffff80e133ac>] create_boot_cache+0x70/0x9c
    [    0.000000] [<ffffffff80e17ab2>] kmem_cache_init+0x6c/0x11e
    [    0.000000] [<ffffffff80e00fd6>] mm_init+0xd8/0xfe
    [    0.000000] [<ffffffff80e011d8>] start_kernel+0x190/0x3ca
    [    0.000000]
    [    0.000000] The buggy address belongs to stack of task swapper/0
    [    0.000000]  and is located at offset 0 in frame:
    [    0.000000]  stack_trace_save+0x0/0xa6
    [    0.000000]
    [    0.000000] This frame has 1 object:
    [    0.000000]  [32, 56) 'c'
    [    0.000000]
    [    0.000000] The buggy address belongs to the physical page:
    [    0.000000] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x81a07
    [    0.000000] flags: 0x1000(reserved|zone=0)
    [    0.000000] raw: 0000000000001000 ff600003f1e3d150 ff600003f1e3d150 0000000000000000
    [    0.000000] raw: 0000000000000000 0000000000000000 00000001ffffffff
    [    0.000000] page dumped because: kasan: bad access detected
    [    0.000000]
    [    0.000000] Memory state around the buggy address:
    [    0.000000]  ffffffff81807b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    [    0.000000]  ffffffff81807b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    [    0.000000] >ffffffff81807c00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 f3
    [    0.000000]                                            ^
    [    0.000000]  ffffffff81807c80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
    [    0.000000]  ffffffff81807d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    [    0.000000] ==================================================================

    Fix that by using READ_ONCE_NOCHECK when reading the stack in imprecise
    mode.

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-2025-990809
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a51f73ba");
  # https://lore.kernel.org/linux-cve-announce/2025050236-CVE-2023-53135-3c65@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7a863184");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53135");
  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-2023-53135");

  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:"2025/05/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/12");

  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:"^20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 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': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', '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');
}