Unity Linux 20.1070a Security Update: kernel (UTSA-2025-443680)

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

include('compat.inc');

if (description)
{
  script_id(267153);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2024-56548");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-443680)");

  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-2025-443680 advisory.

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

    hfsplus: don't query the device logical block size multiple times

    Devices block sizes may change. One of these cases is a loop device by
    using ioctl LOOP_SET_BLOCK_SIZE.

    While this may cause other issues like IO being rejected, in the case of
    hfsplus, it will allocate a block by using that size and potentially write
    out-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the
    latter function reads a different io_size.

    Using a new min_io_size initally set to sb_min_blocksize works for the
    purposes of the original fix, since it will be set to the max between
    HFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the
    max between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not
    initialized.

    Tested by mounting an hfsplus filesystem with loop block sizes 512, 1024
    and 4096.

    The produced KASAN report before the fix looks like this:

    [  419.944641] ==================================================================
    [  419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a
    [  419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678
    [  419.947612]
    [  419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84
    [  419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
    [  419.950035] Call Trace:
    [  419.950384]  <TASK>
    [  419.950676]  dump_stack_lvl+0x57/0x78
    [  419.951212]  ? hfsplus_read_wrapper+0x659/0xa0a
    [  419.951830]  print_report+0x14c/0x49e
    [  419.952361]  ? __virt_addr_valid+0x267/0x278
    [  419.952979]  ? kmem_cache_debug_flags+0xc/0x1d
    [  419.953561]  ? hfsplus_read_wrapper+0x659/0xa0a
    [  419.954231]  kasan_report+0x89/0xb0
    [  419.954748]  ? hfsplus_read_wrapper+0x659/0xa0a
    [  419.955367]  hfsplus_read_wrapper+0x659/0xa0a
    [  419.955948]  ? __pfx_hfsplus_read_wrapper+0x10/0x10
    [  419.956618]  ? do_raw_spin_unlock+0x59/0x1a9
    [  419.957214]  ? _raw_spin_unlock+0x1a/0x2e
    [  419.957772]  hfsplus_fill_super+0x348/0x1590
    [  419.958355]  ? hlock_class+0x4c/0x109
    [  419.958867]  ? __pfx_hfsplus_fill_super+0x10/0x10
    [  419.959499]  ? __pfx_string+0x10/0x10
    [  419.960006]  ? lock_acquire+0x3e2/0x454
    [  419.960532]  ? bdev_name.constprop.0+0xce/0x243
    [  419.961129]  ? __pfx_bdev_name.constprop.0+0x10/0x10
    [  419.961799]  ? pointer+0x3f0/0x62f
    [  419.962277]  ? __pfx_pointer+0x10/0x10
    [  419.962761]  ? vsnprintf+0x6c4/0xfba
    [  419.963178]  ? __pfx_vsnprintf+0x10/0x10
    [  419.963621]  ? setup_bdev_super+0x376/0x3b3
    [  419.964029]  ? snprintf+0x9d/0xd2
    [  419.964344]  ? __pfx_snprintf+0x10/0x10
    [  419.964675]  ? lock_acquired+0x45c/0x5e9
    [  419.965016]  ? set_blocksize+0x139/0x1c1
    [  419.965381]  ? sb_set_blocksize+0x6d/0xae
    [  419.965742]  ? __pfx_hfsplus_fill_super+0x10/0x10
    [  419.966179]  mount_bdev+0x12f/0x1bf
    [  419.966512]  ? __pfx_mount_bdev+0x10/0x10
    [  419.966886]  ? vfs_parse_fs_string+0xce/0x111
    [  419.967293]  ? __pfx_vfs_parse_fs_string+0x10/0x10
    [  419.967702]  ? __pfx_hfsplus_mount+0x10/0x10
    [  419.968073]  legacy_get_tree+0x104/0x178
    [  419.968414]  vfs_get_tree+0x86/0x296
    [  419.968751]  path_mount+0xba3/0xd0b
    [  419.969157]  ? __pfx_path_mount+0x10/0x10
    [  419.969594]  ? kmem_cache_free+0x1e2/0x260
    [  419.970311]  do_mount+0x99/0xe0
    [  419.970630]  ? __pfx_do_mount+0x10/0x10
    [  419.971008]  __do_sys_mount+0x199/0x1c9
    [  419.971397]  do_syscall_64+0xd0/0x135
    [  419.971761]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
    [  419.972233] RIP: 0033:0x7c3cb812972e
    [  419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90
    f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01
    48
    [  419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
    [  419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e
    [  419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI:
    ---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-2025-443680
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2756509a");
  # https://lore.kernel.org/linux-cve-announce/2024122729-CVE-2024-56548-8bfd@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?23bae04f");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-56548");
  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: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: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-2024-56548");

  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:"2024/12/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/09");
  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-5.10.0-74.12', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', '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');
}