Unity Linux 20.1050e Security Update: kernel (UTSA-2025-991114)

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

include('compat.inc');

if (description)
{
  script_id(278214);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/11");

  script_cve_id("CVE-2023-53147");

  script_name(english:"Unity Linux 20.1050e Security Update: kernel (UTSA-2025-991114)");

  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-2025-991114 advisory.

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

    xfrm: add NULL check in xfrm_update_ae_params

    Normally, x->replay_esn and x->preplay_esn should be allocated at
    xfrm_alloc_replay_state_esn(...) in xfrm_state_construct(...), hence the
    xfrm_update_ae_params(...) is okay to update them. However, the current
    implementation of xfrm_new_ae(...) allows a malicious user to directly
    dereference a NULL pointer and crash the kernel like below.

    BUG: kernel NULL pointer dereference, address: 0000000000000000
    PGD 8253067 P4D 8253067 PUD 8e0e067 PMD 0
    Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI
    CPU: 0 PID: 98 Comm: poc.npd Not tainted 6.4.0-rc7-00072-gdad9774deaf1 #8
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.o4
    RIP: 0010:memcpy_orig+0xad/0x140
    Code: e8 4c 89 5f e0 48 8d 7f e0 73 d2 83 c2 20 48 29 d6 48 29 d7 83 fa 10 72 34 4c 8b 06 4c 8b 4e 08 c
    RSP: 0018:ffff888008f57658 EFLAGS: 00000202
    RAX: 0000000000000000 RBX: ffff888008bd0000 RCX: ffffffff8238e571
    RDX: 0000000000000018 RSI: ffff888007f64844 RDI: 0000000000000000
    RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000000 R12: ffff888008f57818
    R13: ffff888007f64aa4 R14: 0000000000000000 R15: 0000000000000000
    FS:  00000000014013c0(0000) GS:ffff88806d600000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 0000000000000000 CR3: 00000000054d8000 CR4: 00000000000006f0
    Call Trace:
     <TASK>
     ? __die+0x1f/0x70
     ? page_fault_oops+0x1e8/0x500
     ? __pfx_is_prefetch.constprop.0+0x10/0x10
     ? __pfx_page_fault_oops+0x10/0x10
     ? _raw_spin_unlock_irqrestore+0x11/0x40
     ? fixup_exception+0x36/0x460
     ? _raw_spin_unlock_irqrestore+0x11/0x40
     ? exc_page_fault+0x5e/0xc0
     ? asm_exc_page_fault+0x26/0x30
     ? xfrm_update_ae_params+0xd1/0x260
     ? memcpy_orig+0xad/0x140
     ? __pfx__raw_spin_lock_bh+0x10/0x10
     xfrm_update_ae_params+0xe7/0x260
     xfrm_new_ae+0x298/0x4e0
     ? __pfx_xfrm_new_ae+0x10/0x10
     ? __pfx_xfrm_new_ae+0x10/0x10
     xfrm_user_rcv_msg+0x25a/0x410
     ? __pfx_xfrm_user_rcv_msg+0x10/0x10
     ? __alloc_skb+0xcf/0x210
     ? stack_trace_save+0x90/0xd0
     ? filter_irq_stacks+0x1c/0x70
     ? __stack_depot_save+0x39/0x4e0
     ? __kasan_slab_free+0x10a/0x190
     ? kmem_cache_free+0x9c/0x340
     ? netlink_recvmsg+0x23c/0x660
     ? sock_recvmsg+0xeb/0xf0
     ? __sys_recvfrom+0x13c/0x1f0
     ? __x64_sys_recvfrom+0x71/0x90
     ? do_syscall_64+0x3f/0x90
     ? entry_SYSCALL_64_after_hwframe+0x72/0xdc
     ? copyout+0x3e/0x50
     netlink_rcv_skb+0xd6/0x210
     ? __pfx_xfrm_user_rcv_msg+0x10/0x10
     ? __pfx_netlink_rcv_skb+0x10/0x10
     ? __pfx_sock_has_perm+0x10/0x10
     ? mutex_lock+0x8d/0xe0
     ? __pfx_mutex_lock+0x10/0x10
     xfrm_netlink_rcv+0x44/0x50
     netlink_unicast+0x36f/0x4c0
     ? __pfx_netlink_unicast+0x10/0x10
     ? netlink_recvmsg+0x500/0x660
     netlink_sendmsg+0x3b7/0x700

    This Null-ptr-deref bug is assigned CVE-2023-3772. And this commit
    adds additional NULL check in xfrm_update_ae_params to fix the NPD.

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-2025-991114
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?25ee3dfd");
  # https://lore.kernel.org/linux-cve-announce/2025091551-CVE-2023-53147-8f20@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d5da1c15");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53147");
  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-2023-53147");

  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:"2021/09/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/11");

  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:"^20.1050e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e', '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': '1050e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2211.5.0.0178.45', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.45', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.45', 'sp':'1050e', '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');
}