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nessusThis script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.REDHAT-RHSA-2019-2854.NASL
HistorySep 23, 2019 - 12:00 a.m.

RHEL 7 : kpatch-patch (RHSA-2019:2854)

2019-09-2300:00:00
This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
35

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

7

Confidence

Low

EPSS

0.001

Percentile

29.4%

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2019:2854 advisory.

  • kernel: vhost-net: guest to host kernel escape during migration (CVE-2019-14835)

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:2854. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(129150);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/27");

  script_cve_id("CVE-2019-14835");
  script_xref(name:"RHSA", value:"2019:2854");

  script_name(english:"RHEL 7 : kpatch-patch (RHSA-2019:2854)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for kpatch-patch.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2019:2854 advisory.

  - kernel: vhost-net: guest to host kernel escape during migration (CVE-2019-14835)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2019/rhsa-2019_2854.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?17ea67ff");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/vulnerabilities/kernel-vhost");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1750727");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:2854");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kpatch-patch package based on the guidance in RHSA-2019:2854.");
  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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-14835");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(120);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/09/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_1_1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("linux_alt_patch_detect.nasl", "redhat_repos.nasl", "ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');
include('ksplice.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var uname_r = get_kb_item("Host/uname-r");
if (empty_or_null(uname_r)) audit(AUDIT_UNKNOWN_APP_VER, "kernel");
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2019-14835');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2019:2854');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}


var kernel_live_checks = [
  {
    'repo_relative_urls': [
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/debug',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/os',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/optional/source/SRPMS',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/os',
      'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/source/SRPMS',
      'content/dist/rhel/power-le/7/7.9/ppc64le/debug',
      'content/dist/rhel/power-le/7/7.9/ppc64le/highavailability/debug',
      'content/dist/rhel/power-le/7/7.9/ppc64le/highavailability/os',
      'content/dist/rhel/power-le/7/7.9/ppc64le/highavailability/source/SRPMS',
      'content/dist/rhel/power-le/7/7.9/ppc64le/optional/debug',
      'content/dist/rhel/power-le/7/7.9/ppc64le/optional/os',
      'content/dist/rhel/power-le/7/7.9/ppc64le/optional/source/SRPMS',
      'content/dist/rhel/power-le/7/7.9/ppc64le/os',
      'content/dist/rhel/power-le/7/7.9/ppc64le/resilientstorage/debug',
      'content/dist/rhel/power-le/7/7.9/ppc64le/resilientstorage/os',
      'content/dist/rhel/power-le/7/7.9/ppc64le/resilientstorage/source/SRPMS',
      'content/dist/rhel/power-le/7/7.9/ppc64le/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/highavailability/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/highavailability/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/highavailability/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/optional/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/optional/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/optional/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/resilientstorage/debug',
      'content/dist/rhel/power-le/7/7Server/ppc64le/resilientstorage/os',
      'content/dist/rhel/power-le/7/7Server/ppc64le/resilientstorage/source/SRPMS',
      'content/dist/rhel/power-le/7/7Server/ppc64le/source/SRPMS',
      'content/dist/rhel/power/7/7.9/ppc64/debug',
      'content/dist/rhel/power/7/7.9/ppc64/optional/debug',
      'content/dist/rhel/power/7/7.9/ppc64/optional/os',
      'content/dist/rhel/power/7/7.9/ppc64/optional/source/SRPMS',
      'content/dist/rhel/power/7/7.9/ppc64/os',
      'content/dist/rhel/power/7/7.9/ppc64/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/debug',
      'content/dist/rhel/power/7/7Server/ppc64/optional/debug',
      'content/dist/rhel/power/7/7Server/ppc64/optional/os',
      'content/dist/rhel/power/7/7Server/ppc64/optional/source/SRPMS',
      'content/dist/rhel/power/7/7Server/ppc64/os',
      'content/dist/rhel/power/7/7Server/ppc64/source/SRPMS',
      'content/dist/rhel/server/7/7.9/x86_64/debug',
      'content/dist/rhel/server/7/7.9/x86_64/highavailability/debug',
      'content/dist/rhel/server/7/7.9/x86_64/highavailability/os',
      'content/dist/rhel/server/7/7.9/x86_64/highavailability/source/SRPMS',
      'content/dist/rhel/server/7/7.9/x86_64/optional/debug',
      'content/dist/rhel/server/7/7.9/x86_64/optional/os',
      'content/dist/rhel/server/7/7.9/x86_64/optional/source/SRPMS',
      'content/dist/rhel/server/7/7.9/x86_64/os',
      'content/dist/rhel/server/7/7.9/x86_64/resilientstorage/debug',
      'content/dist/rhel/server/7/7.9/x86_64/resilientstorage/os',
      'content/dist/rhel/server/7/7.9/x86_64/resilientstorage/source/SRPMS',
      'content/dist/rhel/server/7/7.9/x86_64/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/debug',
      'content/dist/rhel/server/7/7Server/x86_64/highavailability/debug',
      'content/dist/rhel/server/7/7Server/x86_64/highavailability/os',
      'content/dist/rhel/server/7/7Server/x86_64/highavailability/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/optional/debug',
      'content/dist/rhel/server/7/7Server/x86_64/optional/os',
      'content/dist/rhel/server/7/7Server/x86_64/optional/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/os',
      'content/dist/rhel/server/7/7Server/x86_64/resilientstorage/debug',
      'content/dist/rhel/server/7/7Server/x86_64/resilientstorage/os',
      'content/dist/rhel/server/7/7Server/x86_64/resilientstorage/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/source/SRPMS',
      'content/fastrack/rhel/power/7/ppc64/debug',
      'content/fastrack/rhel/power/7/ppc64/optional/debug',
      'content/fastrack/rhel/power/7/ppc64/optional/os',
      'content/fastrack/rhel/power/7/ppc64/optional/source/SRPMS',
      'content/fastrack/rhel/power/7/ppc64/os',
      'content/fastrack/rhel/power/7/ppc64/source/SRPMS',
      'content/fastrack/rhel/server/7/x86_64/debug',
      'content/fastrack/rhel/server/7/x86_64/highavailability/debug',
      'content/fastrack/rhel/server/7/x86_64/highavailability/os',
      'content/fastrack/rhel/server/7/x86_64/highavailability/source/SRPMS',
      'content/fastrack/rhel/server/7/x86_64/optional/debug',
      'content/fastrack/rhel/server/7/x86_64/optional/os',
      'content/fastrack/rhel/server/7/x86_64/optional/source/SRPMS',
      'content/fastrack/rhel/server/7/x86_64/os',
      'content/fastrack/rhel/server/7/x86_64/resilientstorage/debug',
      'content/fastrack/rhel/server/7/x86_64/resilientstorage/os',
      'content/fastrack/rhel/server/7/x86_64/resilientstorage/source/SRPMS',
      'content/fastrack/rhel/server/7/x86_64/source/SRPMS'
    ],
    'kernels': {
      '3.10.0-1062.el7.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-3_10_0-1062-1-1.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '3.10.0-1062.el7.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-3_10_0-1062-1-1.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '3.10.0-1062.1.1.el7.ppc64le': {
        'pkgs': [
          {'reference':'kpatch-patch-3_10_0-1062_1_1-1-1.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
        ]
      },
      '3.10.0-1062.1.1.el7.x86_64': {
        'pkgs': [
          {'reference':'kpatch-patch-3_10_0-1062_1_1-1-1.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
        ]
      }
    }
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:kernel_live_checks);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
var kernel_affected = FALSE;
foreach var kernel_array ( kernel_live_checks ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(kernel_array['repo_relative_urls'])) repo_relative_urls = kernel_array['repo_relative_urls'];
  var kpatch_details = kernel_array['kernels'][uname_r];
  if (empty_or_null(kpatch_details)) continue;
  kernel_affected = TRUE;
  foreach var pkg ( kpatch_details['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var epoch = NULL;
    var allowmaj = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    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 &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
        rpm_check(release:_release, 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++;
  }
}
# No kpatch details found for the running kernel version
if (!kernel_affected) audit(AUDIT_INST_VER_NOT_VULN, 'kernel', uname_r);

if (flag)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kpatch-patch-3_10_0-1062 / kpatch-patch-3_10_0-1062_1_1');
}
VendorProductVersionCPE
redhatenterprise_linuxkpatch-patch-3_10_0-1062p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062
redhatenterprise_linuxkpatch-patch-3_10_0-1062_1_1p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062_1_1
redhatenterprise_linux7cpe:/o:redhat:enterprise_linux:7

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

7

Confidence

Low

EPSS

0.001

Percentile

29.4%