Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992869)

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

include('compat.inc');

if (description)
{
  script_id(281019);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/31");

  script_cve_id("CVE-2022-50315");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992869)");

  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-2025-992869 advisory.

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

    ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS

    UBSAN complains about array-index-out-of-bounds:
    [ 1.980703] kernel: UBSAN: array-index-out-of-bounds in
    /build/linux-9H675w/linux-5.15.0/drivers/ata/libahci.c:968:41
    [ 1.980709] kernel: index 15 is out of range for type 'ahci_em_priv [8]'
    [ 1.980713] kernel: CPU: 0 PID: 209 Comm: scsi_eh_8 Not tainted 5.15.0-25-generic #25-Ubuntu
    [ 1.980716] kernel: Hardware name: System manufacturer System Product Name/P5Q3, BIOS 1102 06/11/2010
    [ 1.980718] kernel: Call Trace:
    [ 1.980721] kernel: <TASK>
    [ 1.980723] kernel: show_stack+0x52/0x58
    [ 1.980729] kernel: dump_stack_lvl+0x4a/0x5f
    [ 1.980734] kernel: dump_stack+0x10/0x12
    [ 1.980736] kernel: ubsan_epilogue+0x9/0x45
    [ 1.980739] kernel: __ubsan_handle_out_of_bounds.cold+0x44/0x49
    [ 1.980742] kernel: ahci_qc_issue+0x166/0x170 [libahci]
    [ 1.980748] kernel: ata_qc_issue+0x135/0x240
    [ 1.980752] kernel: ata_exec_internal_sg+0x2c4/0x580
    [ 1.980754] kernel: ? vprintk_default+0x1d/0x20
    [ 1.980759] kernel: ata_exec_internal+0x67/0xa0
    [ 1.980762] kernel: sata_pmp_read+0x8d/0xc0
    [ 1.980765] kernel: sata_pmp_read_gscr+0x3c/0x90
    [ 1.980768] kernel: sata_pmp_attach+0x8b/0x310
    [ 1.980771] kernel: ata_eh_revalidate_and_attach+0x28c/0x4b0
    [ 1.980775] kernel: ata_eh_recover+0x6b6/0xb30
    [ 1.980778] kernel: ? ahci_do_hardreset+0x180/0x180 [libahci]
    [ 1.980783] kernel: ? ahci_stop_engine+0xb0/0xb0 [libahci]
    [ 1.980787] kernel: ? ahci_do_softreset+0x290/0x290 [libahci]
    [ 1.980792] kernel: ? trace_event_raw_event_ata_eh_link_autopsy_qc+0xe0/0xe0
    [ 1.980795] kernel: sata_pmp_eh_recover.isra.0+0x214/0x560
    [ 1.980799] kernel: sata_pmp_error_handler+0x23/0x40
    [ 1.980802] kernel: ahci_error_handler+0x43/0x80 [libahci]
    [ 1.980806] kernel: ata_scsi_port_error_handler+0x2b1/0x600
    [ 1.980810] kernel: ata_scsi_error+0x9c/0xd0
    [ 1.980813] kernel: scsi_error_handler+0xa1/0x180
    [ 1.980817] kernel: ? scsi_unjam_host+0x1c0/0x1c0
    [ 1.980820] kernel: kthread+0x12a/0x150
    [ 1.980823] kernel: ? set_kthread_struct+0x50/0x50
    [ 1.980826] kernel: ret_from_fork+0x22/0x30
    [ 1.980831] kernel: </TASK>

    This happens because sata_pmp_init_links() initialize link->pmp up to
    SATA_PMP_MAX_PORTS while em_priv is declared as 8 elements array.

    I can't find the maximum Enclosure Management ports specified in AHCI
    spec v1.3.1, but 12.2.1 LED message type states that Port Multiplier
    Information can utilize 4 bits, which implies it can support up to 16
    ports. Hence, use SATA_PMP_MAX_PORTS as EM_MAX_SLOTS to resolve the
    issue.

    BugLink: https://bugs.launchpad.net/bugs/1970074

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-2025-992869
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?168d7856");
  # https://lore.kernel.org/linux-cve-announce/2025091500-CVE-2022-50315-a3b8@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4f7c3728");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50315");
  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:C/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:H/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-2022-50315");

  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');
}