Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990598)

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

include('compat.inc');

if (description)
{
  script_id(274179);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/06");

  script_cve_id("CVE-2022-48795");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990598)");

  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-2025-990598 advisory.

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

    parisc: Fix data TLB miss in sba_unmap_sg

    Rolf Eike Beer reported the following bug:

    [1274934.746891] Bad Address (null pointer deref?): Code=15 (Data TLB miss fault) at addr 0000004140000018
    [1274934.746891] CPU: 3 PID: 5549 Comm: cmake Not tainted 5.15.4-gentoo-parisc64 #4
    [1274934.746891] Hardware name: 9000/785/C8000
    [1274934.746891]
    [1274934.746891]      YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
    [1274934.746891] PSW: 00001000000001001111111000001110 Not tainted
    [1274934.746891] r00-03  000000ff0804fe0e 0000000040bc9bc0 00000000406760e4 0000004140000000
    [1274934.746891] r04-07  0000000040b693c0 0000004140000000 000000004a2b08b0 0000000000000001
    [1274934.746891] r08-11  0000000041f98810 0000000000000000 000000004a0a7000 0000000000000001
    [1274934.746891] r12-15  0000000040bddbc0 0000000040c0cbc0 0000000040bddbc0 0000000040bddbc0
    [1274934.746891] r16-19  0000000040bde3c0 0000000040bddbc0 0000000040bde3c0 0000000000000007
    [1274934.746891] r20-23  0000000000000006 000000004a368950 0000000000000000 0000000000000001
    [1274934.746891] r24-27  0000000000001fff 000000000800000e 000000004a1710f0 0000000040b693c0
    [1274934.746891] r28-31  0000000000000001 0000000041f988b0 0000000041f98840 000000004a171118
    [1274934.746891] sr00-03  00000000066e5800 0000000000000000 0000000000000000 00000000066e5800
    [1274934.746891] sr04-07  0000000000000000 0000000000000000 0000000000000000 0000000000000000
    [1274934.746891]
    [1274934.746891] IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000406760e8 00000000406760ec
    [1274934.746891]  IIR: 48780030    ISR: 0000000000000000  IOR: 0000004140000018
    [1274934.746891]  CPU:        3   CR30: 00000040e3a9c000 CR31: ffffffffffffffff
    [1274934.746891]  ORIG_R28: 0000000040acdd58
    [1274934.746891]  IAOQ[0]: sba_unmap_sg+0xb0/0x118
    [1274934.746891]  IAOQ[1]: sba_unmap_sg+0xb4/0x118
    [1274934.746891]  RP(r2): sba_unmap_sg+0xac/0x118
    [1274934.746891] Backtrace:
    [1274934.746891]  [<00000000402740cc>] dma_unmap_sg_attrs+0x6c/0x70
    [1274934.746891]  [<000000004074d6bc>] scsi_dma_unmap+0x54/0x60
    [1274934.746891]  [<00000000407a3488>] mptscsih_io_done+0x150/0xd70
    [1274934.746891]  [<0000000040798600>] mpt_interrupt+0x168/0xa68
    [1274934.746891]  [<0000000040255a48>] __handle_irq_event_percpu+0xc8/0x278
    [1274934.746891]  [<0000000040255c34>] handle_irq_event_percpu+0x3c/0xd8
    [1274934.746891]  [<000000004025ecb4>] handle_percpu_irq+0xb4/0xf0
    [1274934.746891]  [<00000000402548e0>] generic_handle_irq+0x50/0x70
    [1274934.746891]  [<000000004019a254>] call_on_stack+0x18/0x24
    [1274934.746891]
    [1274934.746891] Kernel panic - not syncing: Bad Address (null pointer deref?)

    The bug is caused by overrunning the sglist and incorrectly testing
    sg_dma_len(sglist) before nents. Normally this doesn't cause a crash,
    but in this case sglist crossed a page boundary. This occurs in the
    following code:

            while (sg_dma_len(sglist) && nents--) {

    The fix is simply to test nents first and move the decrement of nents
    into the loop.

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-2025-990598
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9adb73af");
  # https://lore.kernel.org/linux-cve-announce/2024071642-CVE-2022-48795-4de4@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4c5e43a6");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-48795");
  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-2022-48795");

  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:"2024/07/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/06");

  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:"^20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 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': '1070a',
    'pkgs': [
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.003', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.0-91.82.190.003', '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');
}