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nessusThis script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.ORACLELINUX_ELSA-2020-5714.NASL
HistoryJun 10, 2020 - 12:00 a.m.

Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2020-5714)

2020-06-1000:00:00
This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
30
oracle linux
unbreakable enterprise kernel
elsa-2020-5714
linux kernel
cve-2019-19377
cve-2020-12654
intel processors
cve-2020-0543
cve-2020-12464
cve-2020-12465
cve-2020-12653
cve-2020-12657
cve-2020-12659
cve-2020-12768
nessus

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

8

Confidence

High

EPSS

0.002

Percentile

61.5%

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5714 advisory.

- x86/speculation: Add Ivy Bridge to affected list (Josh Poimboeuf)  [Orabug: 31352779]  {CVE-2020-0543}
- x86/speculation: Add SRBDS vulnerability and mitigation documentation (Mark Gross)  [Orabug: 31352779]     {CVE-2020-0543}
- x86/speculation: Add Special Register Buffer Data Sampling (SRBDS) mitigation (Mark Gross)  [Orabug:
31352779]  {CVE-2020-0543}
- x86/cpu: Add 'table' argument to cpu_matches() (Mark Gross)  [Orabug: 31352779]  {CVE-2020-0543}
- x86/cpu: Add a steppings field to struct x86_cpu_id (Mark Gross)  [Orabug: 31352779]  {CVE-2020-0543}
- x86/speculation/spectre_v2: Exclude Zhaoxin CPUs from SPECTRE_V2 (Tony W Wang-oc)  [Orabug: 31352779]     {CVE-2020-0543}
- USB: core: Fix free-while-in-use bug in the USB S-Glibrary (Alan Stern)  [Orabug: 31350962]     {CVE-2020-12464}
- mt76: fix array overflow on receiving too many fragments for a packet (Felix Fietkau)  [Orabug:
31350952]  {CVE-2020-12465}
- mwifiex: Fix possible buffer overflows in mwifiex_cmd_append_vsie_tlv() (Qing Xu)  [Orabug: 31350929]     {CVE-2020-12653}
- block, bfq: fix use-after-free in bfq_idle_slice_timer_body (Zhiqiang Liu)  [Orabug: 31350910]     {CVE-2020-12657}
- xsk: Add missing check on user supplied headroom size (Magnus Karlsson)  [Orabug: 31350732]     {CVE-2020-12659}
- mwifiex: Fix possible buffer overflows in mwifiex_ret_wmm_get_status() (Qing Xu)  [Orabug: 31350513]     {CVE-2020-12654}
- KVM: SVM: Fix potential memory leak in svm_cpu_init() (Miaohe Lin)  [Orabug: 31350455]  {CVE-2020-12768}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2020-5714.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(137290);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/10/23");

  script_cve_id(
    "CVE-2019-19377",
    "CVE-2020-0543",
    "CVE-2020-12464",
    "CVE-2020-12465",
    "CVE-2020-12653",
    "CVE-2020-12654",
    "CVE-2020-12657",
    "CVE-2020-12659",
    "CVE-2020-12768"
  );

  script_name(english:"Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2020-5714)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in
the ELSA-2020-5714 advisory.

    - x86/speculation: Add Ivy Bridge to affected list (Josh Poimboeuf)  [Orabug: 31352779]  {CVE-2020-0543}
    - x86/speculation: Add SRBDS vulnerability and mitigation documentation (Mark Gross)  [Orabug: 31352779]
    {CVE-2020-0543}
    - x86/speculation: Add Special Register Buffer Data Sampling (SRBDS) mitigation (Mark Gross)  [Orabug:
    31352779]  {CVE-2020-0543}
    - x86/cpu: Add 'table' argument to cpu_matches() (Mark Gross)  [Orabug: 31352779]  {CVE-2020-0543}
    - x86/cpu: Add a steppings field to struct x86_cpu_id (Mark Gross)  [Orabug: 31352779]  {CVE-2020-0543}
    - x86/speculation/spectre_v2: Exclude Zhaoxin CPUs from SPECTRE_V2 (Tony W Wang-oc)  [Orabug: 31352779]
    {CVE-2020-0543}
    - USB: core: Fix free-while-in-use bug in the USB S-Glibrary (Alan Stern)  [Orabug: 31350962]
    {CVE-2020-12464}
    - mt76: fix array overflow on receiving too many fragments for a packet (Felix Fietkau)  [Orabug:
    31350952]  {CVE-2020-12465}
    - mwifiex: Fix possible buffer overflows in mwifiex_cmd_append_vsie_tlv() (Qing Xu)  [Orabug: 31350929]
    {CVE-2020-12653}
    - block, bfq: fix use-after-free in bfq_idle_slice_timer_body (Zhiqiang Liu)  [Orabug: 31350910]
    {CVE-2020-12657}
    - xsk: Add missing check on user supplied headroom size (Magnus Karlsson)  [Orabug: 31350732]
    {CVE-2020-12659}
    - mwifiex: Fix possible buffer overflows in mwifiex_ret_wmm_get_status() (Qing Xu)  [Orabug: 31350513]
    {CVE-2020-12654}
    - KVM: SVM: Fix potential memory leak in svm_cpu_init() (Miaohe Lin)  [Orabug: 31350455]  {CVE-2020-12768}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://linux.oracle.com/errata/ELSA-2020-5714.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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-2020-12659");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-12657");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/11/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python-perf");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


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

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^(7|8)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7 / 8', 'Oracle Linux ' + 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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var machine_uptrack_level = get_one_kb_item('Host/uptrack-uname-r');
if (machine_uptrack_level)
{
  var trimmed_uptrack_level = ereg_replace(string:machine_uptrack_level, pattern:"\.(x86_64|i[3-6]86|aarch64)$", replace:'');
  var fixed_uptrack_levels = ['5.4.17-2011.3.2.1.el7uek', '5.4.17-2011.3.2.1.el8uek'];
  foreach var fixed_uptrack_level ( fixed_uptrack_levels ) {
    if (rpm_spec_vers_cmp(a:trimmed_uptrack_level, b:fixed_uptrack_level) >= 0)
    {
      audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for ELSA-2020-5714');
    }
  }
  __rpm_report = 'Running KSplice level of ' + trimmed_uptrack_level + ' does not meet the minimum fixed level of ' + join(fixed_uptrack_levels, sep:' / ') + ' for this advisory.\n\n';
}

var kernel_major_minor = get_kb_item('Host/uname/major_minor');
if (empty_or_null(kernel_major_minor)) exit(1, 'Unable to determine kernel major-minor level.');
var expected_kernel_major_minor = '5.4';
if (kernel_major_minor != expected_kernel_major_minor)
  audit(AUDIT_OS_NOT, 'running kernel level ' + expected_kernel_major_minor + ', it is running kernel level ' + kernel_major_minor);

var pkgs = [
    {'reference':'kernel-uek-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-doc-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-5.4.17'},
    {'reference':'kernel-uek-tools-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-5.4.17'},
    {'reference':'kernel-uek-tools-libs-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-libs-5.4.17'},
    {'reference':'perf-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'perf-5.4.17'},
    {'reference':'python-perf-5.4.17-2011.3.2.1.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'python-perf-5.4.17'},
    {'reference':'kernel-uek-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-doc-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-5.4.17'},
    {'reference':'kernel-uek-tools-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-5.4.17'},
    {'reference':'kernel-uek-tools-libs-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-libs-5.4.17'},
    {'reference':'perf-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'perf-5.4.17'},
    {'reference':'python-perf-5.4.17-2011.3.2.1.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'python-perf-5.4.17'},
    {'reference':'kernel-uek-5.4.17-2011.3.2.1.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2011.3.2.1.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2011.3.2.1.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2011.3.2.1.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-doc-5.4.17-2011.3.2.1.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-5.4.17'},
    {'reference':'kernel-uek-5.4.17-2011.3.2.1.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2011.3.2.1.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2011.3.2.1.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2011.3.2.1.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-doc-5.4.17-2011.3.2.1.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-5.4.17'}
];

var flag = 0;
foreach var package_array ( 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;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 'EL' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release) {
    if (exists_check) {
        if (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)) flag++;
    } else {
        if (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)) 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-uek / kernel-uek-debug / kernel-uek-debug-devel / etc');
}

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

8

Confidence

High

EPSS

0.002

Percentile

61.5%