Unity Linux 20.1050a / 20.1070a Security Update: kernel (UTSA-2025-423544)

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

include('compat.inc');

if (description)
{
  script_id(266760);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/15");

  script_cve_id("CVE-2024-47685");

  script_name(english:"Unity Linux 20.1050a / 20.1070a Security Update: kernel (UTSA-2025-423544)");

  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-2025-423544 advisory.

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

    netfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()

    syzbot reported that nf_reject_ip6_tcphdr_put() was possibly sending
    garbage on the four reserved tcp bits (th->res1)

    Use skb_put_zero() to clear the whole TCP header,
    as done in nf_reject_ip_tcphdr_put()

    BUG: KMSAN: uninit-value in nf_reject_ip6_tcphdr_put+0x688/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:255
      nf_reject_ip6_tcphdr_put+0x688/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:255
      nf_send_reset6+0xd84/0x15b0 net/ipv6/netfilter/nf_reject_ipv6.c:344
      nft_reject_inet_eval+0x3c1/0x880 net/netfilter/nft_reject_inet.c:48
      expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
      nft_do_chain+0x438/0x22a0 net/netfilter/nf_tables_core.c:288
      nft_do_chain_inet+0x41a/0x4f0 net/netfilter/nft_chain_filter.c:161
      nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
      nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626
      nf_hook include/linux/netfilter.h:269 [inline]
      NF_HOOK include/linux/netfilter.h:312 [inline]
      ipv6_rcv+0x29b/0x390 net/ipv6/ip6_input.c:310
      __netif_receive_skb_one_core net/core/dev.c:5661 [inline]
      __netif_receive_skb+0x1da/0xa00 net/core/dev.c:5775
      process_backlog+0x4ad/0xa50 net/core/dev.c:6108
      __napi_poll+0xe7/0x980 net/core/dev.c:6772
      napi_poll net/core/dev.c:6841 [inline]
      net_rx_action+0xa5a/0x19b0 net/core/dev.c:6963
      handle_softirqs+0x1ce/0x800 kernel/softirq.c:554
      __do_softirq+0x14/0x1a kernel/softirq.c:588
      do_softirq+0x9a/0x100 kernel/softirq.c:455
      __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:382
      local_bh_enable include/linux/bottom_half.h:33 [inline]
      rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
      __dev_queue_xmit+0x2692/0x5610 net/core/dev.c:4450
      dev_queue_xmit include/linux/netdevice.h:3105 [inline]
      neigh_resolve_output+0x9ca/0xae0 net/core/neighbour.c:1565
      neigh_output include/net/neighbour.h:542 [inline]
      ip6_finish_output2+0x2347/0x2ba0 net/ipv6/ip6_output.c:141
      __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
      ip6_finish_output+0xbb8/0x14b0 net/ipv6/ip6_output.c:226
      NF_HOOK_COND include/linux/netfilter.h:303 [inline]
      ip6_output+0x356/0x620 net/ipv6/ip6_output.c:247
      dst_output include/net/dst.h:450 [inline]
      NF_HOOK include/linux/netfilter.h:314 [inline]
      ip6_xmit+0x1ba6/0x25d0 net/ipv6/ip6_output.c:366
      inet6_csk_xmit+0x442/0x530 net/ipv6/inet6_connection_sock.c:135
      __tcp_transmit_skb+0x3b07/0x4880 net/ipv4/tcp_output.c:1466
      tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
      tcp_connect+0x35b6/0x7130 net/ipv4/tcp_output.c:4143
      tcp_v6_connect+0x1bcc/0x1e40 net/ipv6/tcp_ipv6.c:333
      __inet_stream_connect+0x2ef/0x1730 net/ipv4/af_inet.c:679
      inet_stream_connect+0x6a/0xd0 net/ipv4/af_inet.c:750
      __sys_connect_file net/socket.c:2061 [inline]
      __sys_connect+0x606/0x690 net/socket.c:2078
      __do_sys_connect net/socket.c:2088 [inline]
      __se_sys_connect net/socket.c:2085 [inline]
      __x64_sys_connect+0x91/0xe0 net/socket.c:2085
      x64_sys_call+0x27a5/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:43
      do_syscall_x64 arch/x86/entry/common.c:52 [inline]
      do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

    Uninit was stored to memory at:
      nf_reject_ip6_tcphdr_put+0x60c/0x6c0 net/ipv6/netfilter/nf_reject_ipv6.c:249
      nf_send_reset6+0xd84/0x15b0 net/ipv6/netfilter/nf_reject_ipv6.c:344
      nft_reject_inet_eval+0x3c1/0x880 net/netfilter/nft_reject_inet.c:48
      expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
      nft_do_chain+0x438/0x22a0 net/netfilter/nf_tables_core.c:288
      nft_do_chain_inet+0x41a/0x4f0 net/netfilter/nft_chain_filter.c:161
      nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
      nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626
      nf_hook include/linux/netfilter.h:269 [inline]
      NF_HOOK include/linux/netfilter.h:312 [inline]
      ipv6_rcv+0x29b/0x390 net/ipv6/ip6_input.c:310
      __netif_receive_skb_one_core
    ---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-2025-423544
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3a573403");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-47685");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/AC:L/PR:N/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-2024-47685");

  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:"2024/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/07");

  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:"^20.1050a|20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050a / 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': '1050a',
    'pkgs': [
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-27.2', 'sp':'1050a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-74.12', '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_HOLE,
      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');
}