Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013291)

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

include('compat.inc');

if (description)
{
  script_id(308021);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/21");

  script_cve_id("CVE-2023-53035");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2026-013291)");

  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-2026-013291 advisory.

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

    nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy()

    The ioctl helper function nilfs_ioctl_wrap_copy(), which exchanges a
    metadata array to/from user space, may copy uninitialized buffer regions
    to user space memory for read-only ioctl commands NILFS_IOCTL_GET_SUINFO
    and NILFS_IOCTL_GET_CPINFO.

    This can occur when the element size of the user space metadata given by
    the v_size member of the argument nilfs_argv structure is larger than the
    size of the metadata element (nilfs_suinfo structure or nilfs_cpinfo
    structure) on the file system side.

    KMSAN-enabled kernels detect this issue as follows:

     BUG: KMSAN: kernel-infoleak in instrument_copy_to_user
     include/linux/instrumented.h:121 [inline]
     BUG: KMSAN: kernel-infoleak in _copy_to_user+0xc0/0x100 lib/usercopy.c:33
      instrument_copy_to_user include/linux/instrumented.h:121 [inline]
      _copy_to_user+0xc0/0x100 lib/usercopy.c:33
      copy_to_user include/linux/uaccess.h:169 [inline]
      nilfs_ioctl_wrap_copy+0x6fa/0xc10 fs/nilfs2/ioctl.c:99
      nilfs_ioctl_get_info fs/nilfs2/ioctl.c:1173 [inline]
      nilfs_ioctl+0x2402/0x4450 fs/nilfs2/ioctl.c:1290
      nilfs_compat_ioctl+0x1b8/0x200 fs/nilfs2/ioctl.c:1343
      __do_compat_sys_ioctl fs/ioctl.c:968 [inline]
      __se_compat_sys_ioctl+0x7dd/0x1000 fs/ioctl.c:910
      __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910
      do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
      __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
      do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
      do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
      entry_SYSENTER_compat_after_hwframe+0x70/0x82

     Uninit was created at:
      __alloc_pages+0x9f6/0xe90 mm/page_alloc.c:5572
      alloc_pages+0xab0/0xd80 mm/mempolicy.c:2287
      __get_free_pages+0x34/0xc0 mm/page_alloc.c:5599
      nilfs_ioctl_wrap_copy+0x223/0xc10 fs/nilfs2/ioctl.c:74
      nilfs_ioctl_get_info fs/nilfs2/ioctl.c:1173 [inline]
      nilfs_ioctl+0x2402/0x4450 fs/nilfs2/ioctl.c:1290
      nilfs_compat_ioctl+0x1b8/0x200 fs/nilfs2/ioctl.c:1343
      __do_compat_sys_ioctl fs/ioctl.c:968 [inline]
      __se_compat_sys_ioctl+0x7dd/0x1000 fs/ioctl.c:910
      __ia32_compat_sys_ioctl+0x93/0xd0 fs/ioctl.c:910
      do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
      __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
      do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
      do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
      entry_SYSENTER_compat_after_hwframe+0x70/0x82

     Bytes 16-127 of 3968 are uninitialized
     ...

    This eliminates the leak issue by initializing the page allocated as
    buffer using get_zeroed_page().

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-2026-013291
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0c015170");
  # https://lore.kernel.org/linux-cve-announce/2025050200-CVE-2023-53035-badd@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e4ce641f");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53035");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/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:H/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-2023-53035");

  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:"2026/04/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/21");

  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) 2026 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 && 'sw_64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2407.1.0', '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');
}