Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992378)

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

include('compat.inc');

if (description)
{
  script_id(280270);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/30");

  script_cve_id("CVE-2022-50231");

  script_name(english:"Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2025-992378)");

  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-2025-992378 advisory.

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

    crypto: arm64/poly1305 - fix a read out-of-bound

    A kasan error was reported during fuzzing:

    BUG: KASAN: slab-out-of-bounds in neon_poly1305_blocks.constprop.0+0x1b4/0x250 [poly1305_neon]
    Read of size 4 at addr ffff0010e293f010 by task syz-executor.5/1646715
    CPU: 4 PID: 1646715 Comm: syz-executor.5 Kdump: loaded Not tainted 5.10.0.aarch64 #1
    Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.59 01/31/2019
    Call trace:
     dump_backtrace+0x0/0x394
     show_stack+0x34/0x4c arch/arm64/kernel/stacktrace.c:196
     __dump_stack lib/dump_stack.c:77 [inline]
     dump_stack+0x158/0x1e4 lib/dump_stack.c:118
     print_address_description.constprop.0+0x68/0x204 mm/kasan/report.c:387
     __kasan_report+0xe0/0x140 mm/kasan/report.c:547
     kasan_report+0x44/0xe0 mm/kasan/report.c:564
     check_memory_region_inline mm/kasan/generic.c:187 [inline]
     __asan_load4+0x94/0xd0 mm/kasan/generic.c:252
     neon_poly1305_blocks.constprop.0+0x1b4/0x250 [poly1305_neon]
     neon_poly1305_do_update+0x6c/0x15c [poly1305_neon]
     neon_poly1305_update+0x9c/0x1c4 [poly1305_neon]
     crypto_shash_update crypto/shash.c:131 [inline]
     shash_finup_unaligned+0x84/0x15c crypto/shash.c:179
     crypto_shash_finup+0x8c/0x140 crypto/shash.c:193
     shash_digest_unaligned+0xb8/0xe4 crypto/shash.c:201
     crypto_shash_digest+0xa4/0xfc crypto/shash.c:217
     crypto_shash_tfm_digest+0xb4/0x150 crypto/shash.c:229
     essiv_skcipher_setkey+0x164/0x200 [essiv]
     crypto_skcipher_setkey+0xb0/0x160 crypto/skcipher.c:612
     skcipher_setkey+0x3c/0x50 crypto/algif_skcipher.c:305
     alg_setkey+0x114/0x2a0 crypto/af_alg.c:220
     alg_setsockopt+0x19c/0x210 crypto/af_alg.c:253
     __sys_setsockopt+0x190/0x2e0 net/socket.c:2123
     __do_sys_setsockopt net/socket.c:2134 [inline]
     __se_sys_setsockopt net/socket.c:2131 [inline]
     __arm64_sys_setsockopt+0x78/0x94 net/socket.c:2131
     __invoke_syscall arch/arm64/kernel/syscall.c:36 [inline]
     invoke_syscall+0x64/0x100 arch/arm64/kernel/syscall.c:48
     el0_svc_common.constprop.0+0x220/0x230 arch/arm64/kernel/syscall.c:155
     do_el0_svc+0xb4/0xd4 arch/arm64/kernel/syscall.c:217
     el0_svc+0x24/0x3c arch/arm64/kernel/entry-common.c:353
     el0_sync_handler+0x160/0x164 arch/arm64/kernel/entry-common.c:369
     el0_sync+0x160/0x180 arch/arm64/kernel/entry.S:683

    This error can be reproduced by the following code compiled as ko on a
    system with kasan enabled:

    #include <linux/module.h>
    #include <linux/crypto.h>
    #include <crypto/hash.h>
    #include <crypto/poly1305.h>

    char test_data[] = \x00\x01\x02\x03\x04\x05\x06\x07
                       \x08\x09\x0a\x0b\x0c\x0d\x0e\x0f
                       \x10\x11\x12\x13\x14\x15\x16\x17
                       \x18\x19\x1a\x1b\x1c\x1d\x1e;

    int init(void)
    {
            struct crypto_shash *tfm = NULL;
            char *data = NULL, *out = NULL;

            tfm = crypto_alloc_shash(poly1305, 0, 0);
            data = kmalloc(POLY1305_KEY_SIZE - 1, GFP_KERNEL);
            out = kmalloc(POLY1305_DIGEST_SIZE, GFP_KERNEL);
            memcpy(data, test_data, POLY1305_KEY_SIZE - 1);
            crypto_shash_tfm_digest(tfm, data, POLY1305_KEY_SIZE - 1, out);

            kfree(data);
            kfree(out);
            return 0;
    }

    void deinit(void)
    {
    }

    module_init(init)
    module_exit(deinit)
    MODULE_LICENSE(GPL);

    The root cause of the bug sits in neon_poly1305_blocks. The logic
    neon_poly1305_blocks() performed is that if it was called with both s[]
    and r[] uninitialized, it will first try to initialize them with the
    data from the first block that it believed to be 32 bytes in length.
    First 16 bytes are used as the key and the next 16 bytes for s[]. This
    would lead to the aforementioned read out-of-bound. However, after
    calling poly1305_init_arch(), only 16 bytes were deducted from the input
    and s[] is initialized yet again with the following 16 bytes. The second
    initialization of s[] is certainly redundent which indicates that the
    first initialization should be for r[] only.

    This patch fixes the issue by calling poly1305_init_arm64() instead o
    ---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-2025-992378
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f2da89e0");
  # https://lore.kernel.org/linux-cve-announce/2025061850-CVE-2022-50231-eb18@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f4d1ad2e");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2022-50231");
  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-2022-50231");

  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:"2022/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/30");

  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:"^20.1060e|20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060e / 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': '1060e',
    'pkgs': [
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', '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');
}