Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990527)

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

include('compat.inc');

if (description)
{
  script_id(274301);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/06");

  script_cve_id("CVE-2022-49276");

  script_name(english:"Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990527)");

  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-2025-990527 advisory.

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

    jffs2: fix memory leak in jffs2_scan_medium

    If an error is returned in jffs2_scan_eraseblock() and some memory
    has been added to the jffs2_summary *s, we can observe the following
    kmemleak report:

    --------------------------------------------
    unreferenced object 0xffff88812b889c40 (size 64):
      comm mount, pid 692, jiffies 4294838325 (age 34.288s)
      hex dump (first 32 bytes):
        40 48 b5 14 81 88 ff ff 01 e0 31 00 00 00 50 00  @H........1...P.
        00 00 01 00 00 00 01 00 00 00 02 00 00 00 09 08  ................
      backtrace:
        [<ffffffffae93a3a3>] __kmalloc+0x613/0x910
        [<ffffffffaf423b9c>] jffs2_sum_add_dirent_mem+0x5c/0xa0
        [<ffffffffb0f3afa8>] jffs2_scan_medium.cold+0x36e5/0x4794
        [<ffffffffb0f3dbe1>] jffs2_do_mount_fs.cold+0xa7/0x2267
        [<ffffffffaf40acf3>] jffs2_do_fill_super+0x383/0xc30
        [<ffffffffaf40c00a>] jffs2_fill_super+0x2ea/0x4c0
        [<ffffffffb0315d64>] mtd_get_sb+0x254/0x400
        [<ffffffffb0315f5f>] mtd_get_sb_by_nr+0x4f/0xd0
        [<ffffffffb0316478>] get_tree_mtd+0x498/0x840
        [<ffffffffaf40bd15>] jffs2_get_tree+0x25/0x30
        [<ffffffffae9f358d>] vfs_get_tree+0x8d/0x2e0
        [<ffffffffaea7a98f>] path_mount+0x50f/0x1e50
        [<ffffffffaea7c3d7>] do_mount+0x107/0x130
        [<ffffffffaea7c5c5>] __se_sys_mount+0x1c5/0x2f0
        [<ffffffffaea7c917>] __x64_sys_mount+0xc7/0x160
        [<ffffffffb10142f5>] do_syscall_64+0x45/0x70
    unreferenced object 0xffff888114b54840 (size 32):
      comm mount, pid 692, jiffies 4294838325 (age 34.288s)
      hex dump (first 32 bytes):
        c0 75 b5 14 81 88 ff ff 02 e0 02 00 00 00 02 00  .u..............
        00 00 84 00 00 00 44 00 00 00 6b 6b 6b 6b 6b a5  ......D...kkkkk.
      backtrace:
        [<ffffffffae93be24>] kmem_cache_alloc_trace+0x584/0x880
        [<ffffffffaf423b04>] jffs2_sum_add_inode_mem+0x54/0x90
        [<ffffffffb0f3bd44>] jffs2_scan_medium.cold+0x4481/0x4794
        [...]
    unreferenced object 0xffff888114b57280 (size 32):
      comm mount, pid 692, jiffies 4294838393 (age 34.357s)
      hex dump (first 32 bytes):
        10 d5 6c 11 81 88 ff ff 08 e0 05 00 00 00 01 00  ..l.............
        00 00 38 02 00 00 28 00 00 00 6b 6b 6b 6b 6b a5  ..8...(...kkkkk.
      backtrace:
        [<ffffffffae93be24>] kmem_cache_alloc_trace+0x584/0x880
        [<ffffffffaf423c34>] jffs2_sum_add_xattr_mem+0x54/0x90
        [<ffffffffb0f3a24f>] jffs2_scan_medium.cold+0x298c/0x4794
        [...]
    unreferenced object 0xffff8881116cd510 (size 16):
      comm mount, pid 692, jiffies 4294838395 (age 34.355s)
      hex dump (first 16 bytes):
        00 00 00 00 00 00 00 00 09 e0 60 02 00 00 6b a5  ..........`...k.
      backtrace:
        [<ffffffffae93be24>] kmem_cache_alloc_trace+0x584/0x880
        [<ffffffffaf423cc4>] jffs2_sum_add_xref_mem+0x54/0x90
        [<ffffffffb0f3b2e3>] jffs2_scan_medium.cold+0x3a20/0x4794
        [...]
    --------------------------------------------

    Therefore, we should call jffs2_sum_reset_collected(s) on exit to
    release the memory added in s. In addition, a new tag out_buf is
    added to prevent the NULL pointer reference caused by s being NULL.
    (thanks to Zhang Yi for this analysis)

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-2025-990527
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d43a1966");
  # https://lore.kernel.org/linux-cve-announce/2025022631-CVE-2022-49276-d58d@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?71785b16");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-49276");
  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-2022-49276");

  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:"2025/02/26");
  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');
}