Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992755)

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

include('compat.inc');

if (description)
{
  script_id(280881);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/31");

  script_cve_id("CVE-2024-33621");

  script_name(english:"Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992755)");

  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-2025-992755 advisory.

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

    ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound

    Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will
    hit WARN_ON_ONCE() in sk_mc_loop() through sch_direct_xmit() path.

    WARNING: CPU: 2 PID: 0 at net/core/sock.c:775 sk_mc_loop+0x2d/0x70
    Modules linked in: sch_netem ipvlan rfkill cirrus drm_shmem_helper sg drm_kms_helper
    CPU: 2 PID: 0 Comm: swapper/2 Kdump: loaded Not tainted 6.9.0+ #279
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
    RIP: 0010:sk_mc_loop+0x2d/0x70
    Code: fa 0f 1f 44 00 00 65 0f b7 15 f7 96 a3 4f 31 c0 66 85 d2 75 26 48 85 ff 74 1c
    RSP: 0018:ffffa9584015cd78 EFLAGS: 00010212
    RAX: 0000000000000011 RBX: ffff91e585793e00 RCX: 0000000002c6a001
    RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff91e589c0f000
    RBP: ffff91e5855bd100 R08: 0000000000000000 R09: 3d00545216f43d00
    R10: ffff91e584fdcc50 R11: 00000060dd8616f4 R12: ffff91e58132d000
    R13: ffff91e584fdcc68 R14: ffff91e5869ce800 R15: ffff91e589c0f000
    FS:  0000000000000000(0000) GS:ffff91e898100000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 00007f788f7c44c0 CR3: 0000000008e1a000 CR4: 00000000000006f0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
    <IRQ>
     ? __warn (kernel/panic.c:693)
     ? sk_mc_loop (net/core/sock.c:760)
     ? report_bug (lib/bug.c:201 lib/bug.c:219)
     ? handle_bug (arch/x86/kernel/traps.c:239)
     ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))
     ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621)
     ? sk_mc_loop (net/core/sock.c:760)
     ip6_finish_output2 (net/ipv6/ip6_output.c:83 (discriminator 1))
     ? nf_hook_slow (net/netfilter/core.c:626)
     ip6_finish_output (net/ipv6/ip6_output.c:222)
     ? __pfx_ip6_finish_output (net/ipv6/ip6_output.c:215)
     ipvlan_xmit_mode_l3 (drivers/net/ipvlan/ipvlan_core.c:602) ipvlan
     ipvlan_start_xmit (drivers/net/ipvlan/ipvlan_main.c:226) ipvlan
     dev_hard_start_xmit (net/core/dev.c:3594)
     sch_direct_xmit (net/sched/sch_generic.c:343)
     __qdisc_run (net/sched/sch_generic.c:416)
     net_tx_action (net/core/dev.c:5286)
     handle_softirqs (kernel/softirq.c:555)
     __irq_exit_rcu (kernel/softirq.c:589)
     sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043)

    The warning triggers as this:
    packet_sendmsg
       packet_snd //skb->sk is packet sk
          __dev_queue_xmit
             __dev_xmit_skb //q->enqueue is not NULL
                 __qdisc_run
                   sch_direct_xmit
                     dev_hard_start_xmit
                       ipvlan_start_xmit
                          ipvlan_xmit_mode_l3 //l3 mode
                            ipvlan_process_outbound //vepa flag
                              ipvlan_process_v6_outbound
                                ip6_local_out
                                    __ip6_finish_output
                                      ip6_finish_output2 //multicast packet
                                        sk_mc_loop //sk->sk_family is AF_PACKET

    Call ip{6}_local_out() with NULL sk in ipvlan as other tunnels to fix this.

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-2025-992755
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?227f2825");
  # https://lore.kernel.org/linux-cve-announce/2024062134-CVE-2024-33621-d3a6@gregkh
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b2294abd");
  script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-33621");
  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-2024-33621");

  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:"2023/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/31");

  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:"^20.1060a|20.1070a([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1060a / 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': '1060a',
    'pkgs': [
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-46.38', 'sp':'1060a', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070a',
    'pkgs': [
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070a', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070a', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', 'sp':'1070a', 'cpu':'loongarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-5.10.0-79.5', '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');
}