Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987513)

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

include('compat.inc');

if (description)
{
  script_id(271037);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/21");

  script_cve_id("CVE-2022-49261");

  script_name(english:"Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987513)");

  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-2025-987513 advisory.

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

    drm/i915/gem: add missing boundary check in vm_access

    A missing bounds check in vm_access() can lead to an out-of-bounds read
    or write in the adjacent memory area, since the len attribute is not
    validated before the memcpy later in the function, potentially hitting:

    [  183.637831] BUG: unable to handle page fault for address: ffffc90000c86000
    [  183.637934] #PF: supervisor read access in kernel mode
    [  183.637997] #PF: error_code(0x0000) - not-present page
    [  183.638059] PGD 100000067 P4D 100000067 PUD 100258067 PMD 106341067 PTE 0
    [  183.638144] Oops: 0000 [#2] PREEMPT SMP NOPTI
    [  183.638201] CPU: 3 PID: 1790 Comm: poc Tainted: G      D           5.17.0-rc6-ci-drm-11296+ #1
    [  183.638298] Hardware name: Intel Corporation CoffeeLake Client Platform/CoffeeLake H DDR4 RVP, BIOS
    CNLSFWR1.R00.X208.B00.1905301319 05/30/2019
    [  183.638430] RIP: 0010:memcpy_erms+0x6/0x10
    [  183.640213] RSP: 0018:ffffc90001763d48 EFLAGS: 00010246
    [  183.641117] RAX: ffff888109c14000 RBX: ffff888111bece40 RCX: 0000000000000ffc
    [  183.642029] RDX: 0000000000001000 RSI: ffffc90000c86000 RDI: ffff888109c14004
    [  183.642946] RBP: 0000000000000ffc R08: 800000000000016b R09: 0000000000000000
    [  183.643848] R10: ffffc90000c85000 R11: 0000000000000048 R12: 0000000000001000
    [  183.644742] R13: ffff888111bed190 R14: ffff888109c14000 R15: 0000000000001000
    [  183.645653] FS:  00007fe5ef807540(0000) GS:ffff88845b380000(0000) knlGS:0000000000000000
    [  183.646570] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  183.647481] CR2: ffffc90000c86000 CR3: 000000010ff02006 CR4: 00000000003706e0
    [  183.648384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    [  183.649271] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    [  183.650142] Call Trace:
    [  183.650988]  <TASK>
    [  183.651793]  vm_access+0x1f0/0x2a0 [i915]
    [  183.652726]  __access_remote_vm+0x224/0x380
    [  183.653561]  mem_rw.isra.0+0xf9/0x190
    [  183.654402]  vfs_read+0x9d/0x1b0
    [  183.655238]  ksys_read+0x63/0xe0
    [  183.656065]  do_syscall_64+0x38/0xc0
    [  183.656882]  entry_SYSCALL_64_after_hwframe+0x44/0xae
    [  183.657663] RIP: 0033:0x7fe5ef725142
    [  183.659351] RSP: 002b:00007ffe1e81c7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
    [  183.660227] RAX: ffffffffffffffda RBX: 0000557055dfb780 RCX: 00007fe5ef725142
    [  183.661104] RDX: 0000000000001000 RSI: 00007ffe1e81d880 RDI: 0000000000000005
    [  183.661972] RBP: 00007ffe1e81e890 R08: 0000000000000030 R09: 0000000000000046
    [  183.662832] R10: 0000557055dfc2e0 R11: 0000000000000246 R12: 0000557055dfb1c0
    [  183.663691] R13: 00007ffe1e81e980 R14: 0000000000000000 R15: 0000000000000000

    Changes since v1:
         - Updated if condition with range_overflows_t [Chris Wilson]

    [mauld: tidy up the commit message and add Cc: stable]
    (cherry picked from commit 661412e301e2ca86799aa4f400d1cf0bd38c57c6)

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-2025-987513
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1be7110d");
  # https://lore.kernel.org/linux-cve-announce/2025022628-CVE-2022-49261-d253@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a1ef1299");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-49261");
  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-2022-49261");

  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:"2023/07/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/21");

  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) 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:"^20.1070e([^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 && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-74.15', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.15', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.15', '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');
}