Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990814)

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

include('compat.inc');

if (description)
{
  script_id(275074);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/12");

  script_cve_id("CVE-2023-53100");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2025-990814)");

  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-2025-990814 advisory.

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

    ext4: fix WARNING in ext4_update_inline_data

    Syzbot found the following issue:
    EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode:
    none.
    fscrypt: AES-256-CTS-CBC using implementation cts-cbc-aes-aesni
    fscrypt: AES-256-XTS using implementation xts-aes-aesni
    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 5071 at mm/page_alloc.c:5525 __alloc_pages+0x30a/0x560 mm/page_alloc.c:5525
    Modules linked in:
    CPU: 1 PID: 5071 Comm: syz-executor263 Not tainted 6.2.0-rc1-syzkaller #0
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
    RIP: 0010:__alloc_pages+0x30a/0x560 mm/page_alloc.c:5525
    RSP: 0018:ffffc90003c2f1c0 EFLAGS: 00010246
    RAX: ffffc90003c2f220 RBX: 0000000000000014 RCX: 0000000000000000
    RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90003c2f248
    RBP: ffffc90003c2f2d8 R08: dffffc0000000000 R09: ffffc90003c2f220
    R10: fffff52000785e49 R11: 1ffff92000785e44 R12: 0000000000040d40
    R13: 1ffff92000785e40 R14: dffffc0000000000 R15: 1ffff92000785e3c
    FS:  0000555556c0d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 00007f95d5e04138 CR3: 00000000793aa000 CR4: 00000000003506f0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
     <TASK>
     __alloc_pages_node include/linux/gfp.h:237 [inline]
     alloc_pages_node include/linux/gfp.h:260 [inline]
     __kmalloc_large_node+0x95/0x1e0 mm/slab_common.c:1113
     __do_kmalloc_node mm/slab_common.c:956 [inline]
     __kmalloc+0xfe/0x190 mm/slab_common.c:981
     kmalloc include/linux/slab.h:584 [inline]
     kzalloc include/linux/slab.h:720 [inline]
     ext4_update_inline_data+0x236/0x6b0 fs/ext4/inline.c:346
     ext4_update_inline_dir fs/ext4/inline.c:1115 [inline]
     ext4_try_add_inline_entry+0x328/0x990 fs/ext4/inline.c:1307
     ext4_add_entry+0x5a4/0xeb0 fs/ext4/namei.c:2385
     ext4_add_nondir+0x96/0x260 fs/ext4/namei.c:2772
     ext4_create+0x36c/0x560 fs/ext4/namei.c:2817
     lookup_open fs/namei.c:3413 [inline]
     open_last_lookups fs/namei.c:3481 [inline]
     path_openat+0x12ac/0x2dd0 fs/namei.c:3711
     do_filp_open+0x264/0x4f0 fs/namei.c:3741
     do_sys_openat2+0x124/0x4e0 fs/open.c:1310
     do_sys_open fs/open.c:1326 [inline]
     __do_sys_openat fs/open.c:1342 [inline]
     __se_sys_openat fs/open.c:1337 [inline]
     __x64_sys_openat+0x243/0x290 fs/open.c:1337
     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
     do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
     entry_SYSCALL_64_after_hwframe+0x63/0xcd

    Above issue happens as follows:
    ext4_iget
       ext4_find_inline_data_nolock ->i_inline_off=164 i_inline_size=60
    ext4_try_add_inline_entry
       __ext4_mark_inode_dirty
          ext4_expand_extra_isize_ea ->i_extra_isize=32 s_want_extra_isize=44
             ext4_xattr_shift_entries
             ->after shift i_inline_off is incorrect, actually is change to 176
    ext4_try_add_inline_entry
      ext4_update_inline_dir
        get_max_inline_xattr_value_size
          if (EXT4_I(inode)->i_inline_off)
            entry = (struct ext4_xattr_entry *)((void *)raw_inode +
                            EXT4_I(inode)->i_inline_off);
            free += EXT4_XATTR_SIZE(le32_to_cpu(entry->e_value_size));
            ->As entry is incorrect, then 'free' may be negative
       ext4_update_inline_data
          value = kzalloc(len, GFP_NOFS);
          -> len is unsigned int, maybe very large, then trigger warning when
             'kzalloc()'

    To resolve the above issue we need to update 'i_inline_off' after
    'ext4_xattr_shift_entries()'.  We do not need to set
    EXT4_STATE_MAY_INLINE_DATA flag here, since ext4_mark_inode_dirty()
    already sets this flag if needed.  Setting EXT4_STATE_MAY_INLINE_DATA
    when it is needed may trigger a BUG_ON in ext4_writepages().

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-2025-990814
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?936fcc27");
  # https://lore.kernel.org/linux-cve-announce/2025050223-CVE-2023-53100-f480@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e3a6f04e");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53100");
  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:N/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-2023-53100");

  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:"2023/11/07");
  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');
}