Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-389366)

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

include('compat.inc');

if (description)
{
  script_id(267272);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2025-22018");

  script_name(english:"Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-389366)");

  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-2025-389366 advisory.

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

    atm: Fix NULL pointer dereference

    When MPOA_cache_impos_rcvd() receives the msg, it can trigger
    Null Pointer Dereference Vulnerability if both entry and
    holding_time are NULL. Because there is only for the situation
    where entry is NULL and holding_time exists, it can be passed
    when both entry and holding_time are NULL. If these are NULL,
    the entry will be passd to eg_cache_put() as parameter and
    it is referenced by entry->use code in it.

    kasan log:

    [    3.316691] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006:I
    [    3.317568] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
    [    3.318188] CPU: 3 UID: 0 PID: 79 Comm: ex Not tainted 6.14.0-rc2 #102
    [    3.318601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
    [    3.319298] RIP: 0010:eg_cache_remove_entry+0xa5/0x470
    [    3.319677] Code: c1 f7 6e fd 48 c7 c7 00 7e 38 b2 e8 95 64 54 fd 48 c7 c7 40 7e 38 b2 48 89 ee e80
    [    3.321220] RSP: 0018:ffff88800583f8a8 EFLAGS: 00010006
    [    3.321596] RAX: 0000000000000006 RBX: ffff888005989000 RCX: ffffffffaecc2d8e
    [    3.322112] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000030
    [    3.322643] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff6558b88
    [    3.323181] R10: 0000000000000003 R11: 203a207972746e65 R12: 1ffff11000b07f15
    [    3.323707] R13: dffffc0000000000 R14: ffff888005989000 R15: ffff888005989068
    [    3.324185] FS:  000000001b6313c0(0000) GS:ffff88806d380000(0000) knlGS:0000000000000000
    [    3.325042] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [    3.325545] CR2: 00000000004b4b40 CR3: 000000000248e000 CR4: 00000000000006f0
    [    3.326430] Call Trace:
    [    3.326725]  <TASK>
    [    3.326927]  ? die_addr+0x3c/0xa0
    [    3.327330]  ? exc_general_protection+0x161/0x2a0
    [    3.327662]  ? asm_exc_general_protection+0x26/0x30
    [    3.328214]  ? vprintk_emit+0x15e/0x420
    [    3.328543]  ? eg_cache_remove_entry+0xa5/0x470
    [    3.328910]  ? eg_cache_remove_entry+0x9a/0x470
    [    3.329294]  ? __pfx_eg_cache_remove_entry+0x10/0x10
    [    3.329664]  ? console_unlock+0x107/0x1d0
    [    3.329946]  ? __pfx_console_unlock+0x10/0x10
    [    3.330283]  ? do_syscall_64+0xa6/0x1a0
    [    3.330584]  ? entry_SYSCALL_64_after_hwframe+0x47/0x7f
    [    3.331090]  ? __pfx_prb_read_valid+0x10/0x10
    [    3.331395]  ? down_trylock+0x52/0x80
    [    3.331703]  ? vprintk_emit+0x15e/0x420
    [    3.331986]  ? __pfx_vprintk_emit+0x10/0x10
    [    3.332279]  ? down_trylock+0x52/0x80
    [    3.332527]  ? _printk+0xbf/0x100
    [    3.332762]  ? __pfx__printk+0x10/0x10
    [    3.333007]  ? _raw_write_lock_irq+0x81/0xe0
    [    3.333284]  ? __pfx__raw_write_lock_irq+0x10/0x10
    [    3.333614]  msg_from_mpoad+0x1185/0x2750
    [    3.333893]  ? __build_skb_around+0x27b/0x3a0
    [    3.334183]  ? __pfx_msg_from_mpoad+0x10/0x10
    [    3.334501]  ? __alloc_skb+0x1c0/0x310
    [    3.334809]  ? __pfx___alloc_skb+0x10/0x10
    [    3.335283]  ? _raw_spin_lock+0xe0/0xe0
    [    3.335632]  ? finish_wait+0x8d/0x1e0
    [    3.335975]  vcc_sendmsg+0x684/0xba0
    [    3.336250]  ? __pfx_vcc_sendmsg+0x10/0x10
    [    3.336587]  ? __pfx_autoremove_wake_function+0x10/0x10
    [    3.337056]  ? fdget+0x176/0x3e0
    [    3.337348]  __sys_sendto+0x4a2/0x510
    [    3.337663]  ? __pfx___sys_sendto+0x10/0x10
    [    3.337969]  ? ioctl_has_perm.constprop.0.isra.0+0x284/0x400
    [    3.338364]  ? sock_ioctl+0x1bb/0x5a0
    [    3.338653]  ? __rseq_handle_notify_resume+0x825/0xd20
    [    3.339017]  ? __pfx_sock_ioctl+0x10/0x10
    [    3.339316]  ? __pfx___rseq_handle_notify_resume+0x10/0x10
    [    3.339727]  ? selinux_file_ioctl+0xa4/0x260
    [    3.340166]  __x64_sys_sendto+0xe0/0x1c0
    [    3.340526]  ? syscall_exit_to_user_mode+0x123/0x140
    [    3.340898]  do_syscall_64+0xa6/0x1a0
    [    3.341170]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
    [    3.341533] RIP: 0033:0x44a380
    [    3.341757] Code: 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c00
    [
    ---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-2025-389366
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9463e66c");
  # https://lore.kernel.org/linux-cve-announce/2025041624-CVE-2025-22018-a1b1@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4654e01c");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2025-22018");
  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-2025-22018");

  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:"2025/04/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/08");
  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:"^20.1050a|20.1060a|20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050a / 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': '1050a',
    'pkgs': [
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1060a',
    'pkgs': [
      {'reference':'kernel-5.10.0-46.34', 'sp':'1060a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.34', 'sp':'1060a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.34', 'sp':'1060a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    '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');
}