Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001004)

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

include('compat.inc');

if (description)
{
  script_id(290905);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/06");

  script_cve_id("CVE-2016-4997");

  script_name(english:"Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001004)");

  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-2026-001004 advisory.

    The compat IPT_SO_SET_REPLACE and IP6T_SO_SET_REPLACE setsockopt implementations in the netfilter
    subsystem in the Linux kernel before 4.6.3 allow local users to gain privileges or cause a denial of
    service (memory corruption) by leveraging in-container root access to provide a crafted offset value that
    triggers an unintended decrement.

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-2026-001004
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ec34e22e");
  # http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce683e5f9d045e5d67d1312a42b359cb2ab2a13c
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cd11e0cb");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00060.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e707a1cc");
  # http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00061.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?86d107a6");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f038b32a");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dd0aec87");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00027.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4f9dbb7a");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?781faab0");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00048.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?52bacd0d");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00050.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?71f27850");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00051.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bb20b394");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00052.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?40fa02cb");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00053.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e46f64d8");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00054.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?67df0f88");
  # http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ff3f6632");
  script_set_attribute(attribute:"see_also", value:"http://rhn.redhat.com/errata/RHSA-2016-1847.html");
  script_set_attribute(attribute:"see_also", value:"http://rhn.redhat.com/errata/RHSA-2016-1875.html");
  script_set_attribute(attribute:"see_also", value:"http://rhn.redhat.com/errata/RHSA-2016-1883.html");
  script_set_attribute(attribute:"see_also", value:"http://www.debian.org/security/2016/dsa-3607");
  script_set_attribute(attribute:"see_also", value:"http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3");
  script_set_attribute(attribute:"see_also", value:"http://www.openwall.com/lists/oss-security/2016/06/24/5");
  script_set_attribute(attribute:"see_also", value:"http://www.openwall.com/lists/oss-security/2016/09/29/10");
  # http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4763b451");
  # http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c85df308");
  # http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cb8b72e0");
  script_set_attribute(attribute:"see_also", value:"http://www.securityfocus.com/bid/91451");
  script_set_attribute(attribute:"see_also", value:"http://www.securitytracker.com/id/1036171");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3016-1");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3016-2");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3016-3");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3016-4");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3017-1");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3017-2");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3017-3");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3018-1");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3018-2");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3019-1");
  script_set_attribute(attribute:"see_also", value:"http://www.ubuntu.com/usn/USN-3020-1");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1349722");
  # https://github.com/nccgroup/TriforceLinuxSyscallFuzzer/tree/master/crash_reports/report_compatIpt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?51549e3a");
  # https://github.com/torvalds/linux/commit/ce683e5f9d045e5d67d1312a42b359cb2ab2a13c
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?11511d87");
  # https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05347541
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6cf219f0");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2016-4997");
  script_set_attribute(attribute:"see_also", value:"https://www.exploit-db.com/exploits/40435/");
  script_set_attribute(attribute:"see_also", value:"https://www.exploit-db.com/exploits/40489/");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-4997");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Linux Kernel 4.6.3 Netfilter Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/06/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/16");

  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) 2026 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:"^20.1050e|20.1060e|20.1070e([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'UOS Server 20.1050e / 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 && 'sw_64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'UOS Server', cpu);


var constraints = [
  {
    'release': '20',
    'sp': '1050e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2211.5.0.0178.45', 'sp':'1050e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.45', 'sp':'1050e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2211.5.0.0178.45', 'sp':'1050e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1060e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2305.1.0.0199.102', 'sp':'1060e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2305.1.0.0199.102', 'sp':'1060e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2305.1.0.0199.102', 'sp':'1060e', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  },
  {
    'release': '20',
    'sp': '1070e',
    'pkgs': [
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.005', 'sp':'1070e', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.005', 'sp':'1070e', 'cpu':'amd64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.005', 'sp':'1070e', 'cpu':'sw_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-4.19.90-2409.6.0.0297.103.005', '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_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');
}