Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992909)

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

include('compat.inc');

if (description)
{
  script_id(281155);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/31");

  script_cve_id("CVE-2023-53265");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992909)");

  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-2025-992909 advisory.

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

    ubi: ensure that VID header offset + VID header size <= alloc, size

    Ensure that the VID header offset + VID header size does not exceed
    the allocated area to avoid slab OOB.

    BUG: KASAN: slab-out-of-bounds in crc32_body lib/crc32.c:111 [inline]
    BUG: KASAN: slab-out-of-bounds in crc32_le_generic lib/crc32.c:179 [inline]
    BUG: KASAN: slab-out-of-bounds in crc32_le_base+0x58c/0x626 lib/crc32.c:197
    Read of size 4 at addr ffff88802bb36f00 by task syz-executor136/1555

    CPU: 2 PID: 1555 Comm: syz-executor136 Tainted: G        W
    6.0.0-1868 #1
    Hardware name: Red Hat KVM, BIOS 1.13.0-2.module+el8.3.0+7860+a7792d29
    04/01/2014
    Call Trace:
      <TASK>
      __dump_stack lib/dump_stack.c:88 [inline]
      dump_stack_lvl+0x85/0xad lib/dump_stack.c:106
      print_address_description mm/kasan/report.c:317 [inline]
      print_report.cold.13+0xb6/0x6bb mm/kasan/report.c:433
      kasan_report+0xa7/0x11b mm/kasan/report.c:495
      crc32_body lib/crc32.c:111 [inline]
      crc32_le_generic lib/crc32.c:179 [inline]
      crc32_le_base+0x58c/0x626 lib/crc32.c:197
      ubi_io_write_vid_hdr+0x1b7/0x472 drivers/mtd/ubi/io.c:1067
      create_vtbl+0x4d5/0x9c4 drivers/mtd/ubi/vtbl.c:317
      create_empty_lvol drivers/mtd/ubi/vtbl.c:500 [inline]
      ubi_read_volume_table+0x67b/0x288a drivers/mtd/ubi/vtbl.c:812
      ubi_attach+0xf34/0x1603 drivers/mtd/ubi/attach.c:1601
      ubi_attach_mtd_dev+0x6f3/0x185e drivers/mtd/ubi/build.c:965
      ctrl_cdev_ioctl+0x2db/0x347 drivers/mtd/ubi/cdev.c:1043
      vfs_ioctl fs/ioctl.c:51 [inline]
      __do_sys_ioctl fs/ioctl.c:870 [inline]
      __se_sys_ioctl fs/ioctl.c:856 [inline]
      __x64_sys_ioctl+0x193/0x213 fs/ioctl.c:856
      do_syscall_x64 arch/x86/entry/common.c:50 [inline]
      do_syscall_64+0x3e/0x86 arch/x86/entry/common.c:80
      entry_SYSCALL_64_after_hwframe+0x63/0x0
    RIP: 0033:0x7f96d5cf753d
    Code:
    RSP: 002b:00007fffd72206f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
    RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96d5cf753d
    RDX: 0000000020000080 RSI: 0000000040186f40 RDI: 0000000000000003
    RBP: 0000000000400cd0 R08: 0000000000000000 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400be0
    R13: 00007fffd72207e0 R14: 0000000000000000 R15: 0000000000000000
      </TASK>

    Allocated by task 1555:
      kasan_save_stack+0x20/0x3d mm/kasan/common.c:38
      kasan_set_track mm/kasan/common.c:45 [inline]
      set_alloc_info mm/kasan/common.c:437 [inline]
      ____kasan_kmalloc mm/kasan/common.c:516 [inline]
      __kasan_kmalloc+0x88/0xa3 mm/kasan/common.c:525
      kasan_kmalloc include/linux/kasan.h:234 [inline]
      __kmalloc+0x138/0x257 mm/slub.c:4429
      kmalloc include/linux/slab.h:605 [inline]
      ubi_alloc_vid_buf drivers/mtd/ubi/ubi.h:1093 [inline]
      create_vtbl+0xcc/0x9c4 drivers/mtd/ubi/vtbl.c:295
      create_empty_lvol drivers/mtd/ubi/vtbl.c:500 [inline]
      ubi_read_volume_table+0x67b/0x288a drivers/mtd/ubi/vtbl.c:812
      ubi_attach+0xf34/0x1603 drivers/mtd/ubi/attach.c:1601
      ubi_attach_mtd_dev+0x6f3/0x185e drivers/mtd/ubi/build.c:965
      ctrl_cdev_ioctl+0x2db/0x347 drivers/mtd/ubi/cdev.c:1043
      vfs_ioctl fs/ioctl.c:51 [inline]
      __do_sys_ioctl fs/ioctl.c:870 [inline]
      __se_sys_ioctl fs/ioctl.c:856 [inline]
      __x64_sys_ioctl+0x193/0x213 fs/ioctl.c:856
      do_syscall_x64 arch/x86/entry/common.c:50 [inline]
      do_syscall_64+0x3e/0x86 arch/x86/entry/common.c:80
      entry_SYSCALL_64_after_hwframe+0x63/0x0

    The buggy address belongs to the object at ffff88802bb36e00
      which belongs to the cache kmalloc-256 of size 256
    The buggy address is located 0 bytes to the right of
      256-byte region [ffff88802bb36e00, ffff88802bb36f00)

    The buggy address belongs to the physical page:
    page:00000000ea4d1263 refcount:1 mapcount:0 mapping:0000000000000000
    index:0x0 pfn:0x2bb36
    head:00000000ea4d1263 order:1 compound_mapcount:0 compound_pincount:0
    flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff)
    raw: 000fffffc0010200 ffffea000066c300 dead000000000003 ffff888100042b40
    raw: 0000000000000000 00000000001
    ---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-2025-992909
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cd36700e");
  # https://lore.kernel.org/linux-cve-announce/2025091602-CVE-2023-53265-72a1@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9f2e0016");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2023-53265");
  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-2023-53265");

  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:"2025/12/31");
  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');
}