Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992764)

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

include('compat.inc');

if (description)
{
  script_id(281369);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/31");

  script_cve_id("CVE-2024-49875");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992764)");

  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-2025-992764 advisory.

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

    nfsd: map the EBADMSG to nfserr_io to avoid warning

    Ext4 will throw -EBADMSG through ext4_readdir when a checksum error
    occurs, resulting in the following WARNING.

    Fix it by mapping EBADMSG to nfserr_io.

    nfsd_buffered_readdir
     iterate_dir // -EBADMSG -74
      ext4_readdir // .iterate_shared
       ext4_dx_readdir
        ext4_htree_fill_tree
         htree_dirblock_to_tree
          ext4_read_dirblock
           __ext4_read_dirblock
            ext4_dirblock_csum_verify
             warn_no_space_for_csum
              __warn_no_space_for_csum
            return ERR_PTR(-EFSBADCRC) // -EBADMSG -74
     nfserrno // WARNING

    [  161.115610] ------------[ cut here ]------------
    [  161.116465] nfsd: non-standard errno: -74
    [  161.117315] WARNING: CPU: 1 PID: 780 at fs/nfsd/nfsproc.c:878 nfserrno+0x9d/0xd0
    [  161.118596] Modules linked in:
    [  161.119243] CPU: 1 PID: 780 Comm: nfsd Not tainted 5.10.0-00014-g79679361fd5d #138
    [  161.120684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
    rel-1.14.0-0-g155821a1990b-prebuilt.qe
    mu.org 04/01/2014
    [  161.123601] RIP: 0010:nfserrno+0x9d/0xd0
    [  161.124676] Code: 0f 87 da 30 dd 00 83 e3 01 b8 00 00 00 05 75 d7 44 89 ee 48 c7 c7 c0 57 24 98 89 44
    24 04 c6
     05 ce 2b 61 03 01 e8 99 20 d8 00 <0f> 0b 8b 44 24 04 eb b5 4c 89 e6 48 c7 c7 a0 6d a4 99 e8 cc 15 33
    [  161.127797] RSP: 0018:ffffc90000e2f9c0 EFLAGS: 00010286
    [  161.128794] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
    [  161.130089] RDX: 1ffff1103ee16f6d RSI: 0000000000000008 RDI: fffff520001c5f2a
    [  161.131379] RBP: 0000000000000022 R08: 0000000000000001 R09: ffff8881f70c1827
    [  161.132664] R10: ffffed103ee18304 R11: 0000000000000001 R12: 0000000000000021
    [  161.133949] R13: 00000000ffffffb6 R14: ffff8881317c0000 R15: ffffc90000e2fbd8
    [  161.135244] FS:  0000000000000000(0000) GS:ffff8881f7080000(0000) knlGS:0000000000000000
    [  161.136695] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  161.137761] CR2: 00007fcaad70b348 CR3: 0000000144256006 CR4: 0000000000770ee0
    [  161.139041] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [  161.140291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    [  161.141519] PKRU: 55555554
    [  161.142076] Call Trace:
    [  161.142575]  ? __warn+0x9b/0x140
    [  161.143229]  ? nfserrno+0x9d/0xd0
    [  161.143872]  ? report_bug+0x125/0x150
    [  161.144595]  ? handle_bug+0x41/0x90
    [  161.145284]  ? exc_invalid_op+0x14/0x70
    [  161.146009]  ? asm_exc_invalid_op+0x12/0x20
    [  161.146816]  ? nfserrno+0x9d/0xd0
    [  161.147487]  nfsd_buffered_readdir+0x28b/0x2b0
    [  161.148333]  ? nfsd4_encode_dirent_fattr+0x380/0x380
    [  161.149258]  ? nfsd_buffered_filldir+0xf0/0xf0
    [  161.150093]  ? wait_for_concurrent_writes+0x170/0x170
    [  161.151004]  ? generic_file_llseek_size+0x48/0x160
    [  161.151895]  nfsd_readdir+0x132/0x190
    [  161.152606]  ? nfsd4_encode_dirent_fattr+0x380/0x380
    [  161.153516]  ? nfsd_unlink+0x380/0x380
    [  161.154256]  ? override_creds+0x45/0x60
    [  161.155006]  nfsd4_encode_readdir+0x21a/0x3d0
    [  161.155850]  ? nfsd4_encode_readlink+0x210/0x210
    [  161.156731]  ? write_bytes_to_xdr_buf+0x97/0xe0
    [  161.157598]  ? __write_bytes_to_xdr_buf+0xd0/0xd0
    [  161.158494]  ? lock_downgrade+0x90/0x90
    [  161.159232]  ? nfs4svc_decode_voidarg+0x10/0x10
    [  161.160092]  nfsd4_encode_operation+0x15a/0x440
    [  161.160959]  nfsd4_proc_compound+0x718/0xe90
    [  161.161818]  nfsd_dispatch+0x18e/0x2c0
    [  161.162586]  svc_process_common+0x786/0xc50
    [  161.163403]  ? nfsd_svc+0x380/0x380
    [  161.164137]  ? svc_printk+0x160/0x160
    [  161.164846]  ? svc_xprt_do_enqueue.part.0+0x365/0x380
    [  161.165808]  ? nfsd_svc+0x380/0x380
    [  161.166523]  ? rcu_is_watching+0x23/0x40
    [  161.167309]  svc_process+0x1a5/0x200
    [  161.168019]  nfsd+0x1f5/0x380
    [  161.168663]  ? nfsd_shutdown_threads+0x260/0x260
    [  161.169554]  kthread+0x1c4/0x210
    [  161.170224]  ? kthread_insert_work_sanity_check+0x80/0x80
    [  161.171246]  ret_from_fork+0x1f/0x30

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-2025-992764
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8848eb9d");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-49875");
  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:C/A:N");
  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:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-49875");

  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:"2024/10/21");
  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');
}