Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989687)

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

include('compat.inc');

if (description)
{
  script_id(273685);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/05");

  script_cve_id("CVE-2021-47562");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989687)");

  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-2025-989687 advisory.

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

    ice: fix vsi->txq_map sizing

    The approach of having XDP queue per CPU regardless of user's setting
    exposed a hidden bug that could occur in case when Rx queue count differ
    from Tx queue count. Currently vsi->txq_map's size is equal to the
    doubled vsi->alloc_txq, which is not correct due to the fact that XDP
    rings were previously based on the Rx queue count. Below splat can be
    seen when ethtool -L is used and XDP rings are configured:

    [  682.875339] BUG: kernel NULL pointer dereference, address: 000000000000000f
    [  682.883403] #PF: supervisor read access in kernel mode
    [  682.889345] #PF: error_code(0x0000) - not-present page
    [  682.895289] PGD 0 P4D 0
    [  682.898218] Oops: 0000 [#1] PREEMPT SMP PTI
    [  682.903055] CPU: 42 PID: 2878 Comm: ethtool Tainted: G           OE     5.15.0-rc5+ #1
    [  682.912214] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235
    05/19/2016
    [  682.923380] RIP: 0010:devres_remove+0x44/0x130
    [  682.928527] Code: 49 89 f4 55 48 89 fd 4c 89 ff 53 48 83 ec 10 e8 92 b9 49 00 48 8b 9d a8 02 00 00 48
    8d 8d a0 02 00 00 49 89 c2 48 39 cb 74 0f <4c> 3b 63 10 74 25 48 8b 5b 08 48 39 cb 75 f1 4c 89 ff 4c 89 d6
    e8
    [  682.950237] RSP: 0018:ffffc90006a679f0 EFLAGS: 00010002
    [  682.956285] RAX: 0000000000000286 RBX: ffffffffffffffff RCX: ffff88908343a370
    [  682.964538] RDX: 0000000000000001 RSI: ffffffff81690d60 RDI: 0000000000000000
    [  682.972789] RBP: ffff88908343a0d0 R08: 0000000000000000 R09: 0000000000000000
    [  682.981040] R10: 0000000000000286 R11: 3fffffffffffffff R12: ffffffff81690d60
    [  682.989282] R13: ffffffff81690a00 R14: ffff8890819807a8 R15: ffff88908343a36c
    [  682.997535] FS:  00007f08c7bfa740(0000) GS:ffff88a03fd00000(0000) knlGS:0000000000000000
    [  683.006910] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  683.013557] CR2: 000000000000000f CR3: 0000001080a66003 CR4: 00000000003706e0
    [  683.021819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [  683.030075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    [  683.038336] Call Trace:
    [  683.041167]  devm_kfree+0x33/0x50
    [  683.045004]  ice_vsi_free_arrays+0x5e/0xc0 [ice]
    [  683.050380]  ice_vsi_rebuild+0x4c8/0x750 [ice]
    [  683.055543]  ice_vsi_recfg_qs+0x9a/0x110 [ice]
    [  683.060697]  ice_set_channels+0x14f/0x290 [ice]
    [  683.065962]  ethnl_set_channels+0x333/0x3f0
    [  683.070807]  genl_family_rcv_msg_doit+0xea/0x150
    [  683.076152]  genl_rcv_msg+0xde/0x1d0
    [  683.080289]  ? channels_prepare_data+0x60/0x60
    [  683.085432]  ? genl_get_cmd+0xd0/0xd0
    [  683.089667]  netlink_rcv_skb+0x50/0xf0
    [  683.094006]  genl_rcv+0x24/0x40
    [  683.097638]  netlink_unicast+0x239/0x340
    [  683.102177]  netlink_sendmsg+0x22e/0x470
    [  683.106717]  sock_sendmsg+0x5e/0x60
    [  683.110756]  __sys_sendto+0xee/0x150
    [  683.114894]  ? handle_mm_fault+0xd0/0x2a0
    [  683.119535]  ? do_user_addr_fault+0x1f3/0x690
    [  683.134173]  __x64_sys_sendto+0x25/0x30
    [  683.148231]  do_syscall_64+0x3b/0xc0
    [  683.161992]  entry_SYSCALL_64_after_hwframe+0x44/0xae

    Fix this by taking into account the value that num_possible_cpus()
    yields in addition to vsi->alloc_txq instead of doubling the latter.

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-2025-989687
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4dd8f8a6");
  # https://lore.kernel.org/linux-cve-announce/2024052451-CVE-2021-47562-52ec@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a06bcfff");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2021-47562");
  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-2021-47562");

  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:"2021/07/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/05");

  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-5.10.0-79.4.2', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.4.2', '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');
}