Lucene search

K
nessusThis script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.REDHAT-RHSA-2020-0839.NASL
HistoryMar 23, 2020 - 12:00 a.m.

RHEL 7 : kernel-rt (RHSA-2020:0839)

2020-03-2300:00:00
This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
35

CVSS2

8.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.7

Confidence

Low

EPSS

0.002

Percentile

52.6%

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:0839 advisory.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

Security Fix(es):

* kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

* kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain     upper-bound check, leading to a buffer overflow (CVE-2019-17666)

* Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)     (CVE-2019-19338)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

* kernel-rt: update to the RHEL7.7.z batch#5 source tree (BZ#1794131)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:0839. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(134825);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/04");

  script_cve_id("CVE-2019-11487", "CVE-2019-17666", "CVE-2019-19338");
  script_bugtraq_id(108054);
  script_xref(name:"RHSA", value:"2020:0839");

  script_name(english:"RHEL 7 : kernel-rt (RHSA-2020:0839)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for kernel-rt.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2020:0839 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with
    extremely high determinism requirements.

    Security Fix(es):

    * kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

    * kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c in the Linux kernel lacks a certain
    upper-bound check, leading to a buffer overflow (CVE-2019-17666)

    * Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)
    (CVE-2019-19338)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
    other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * kernel-rt: update to the RHEL7.7.z batch#5 source tree (BZ#1794131)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2020/rhsa-2020_0839.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4b18926d");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/solutions/tsx-asynchronousabort");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:0839");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1703063");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1763690");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1781514");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL kernel-rt package based on the guidance in RHSA-2020:0839.");
  script_set_cvss_base_vector("CVSS2#AV:A/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:A/AC:L/PR:N/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-2019-17666");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(120, 203, 416);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm");
  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) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl", "linux_alt_patch_detect.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);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2019-11487', 'CVE-2019-17666', 'CVE-2019-19338');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2020:0839');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel/server/7/7.9/x86_64/nfv/debug',
      'content/dist/rhel/server/7/7.9/x86_64/nfv/os',
      'content/dist/rhel/server/7/7.9/x86_64/nfv/source/SRPMS',
      'content/dist/rhel/server/7/7.9/x86_64/rt/debug',
      'content/dist/rhel/server/7/7.9/x86_64/rt/os',
      'content/dist/rhel/server/7/7.9/x86_64/rt/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/nfv/debug',
      'content/dist/rhel/server/7/7Server/x86_64/nfv/os',
      'content/dist/rhel/server/7/7Server/x86_64/nfv/source/SRPMS',
      'content/dist/rhel/server/7/7Server/x86_64/rt/debug',
      'content/dist/rhel/server/7/7Server/x86_64/rt/os',
      'content/dist/rhel/server/7/7Server/x86_64/rt/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'kernel-rt-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-debug-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-debug-devel-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-debug-kvm-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-devel-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-doc-3.10.0-1062.18.1.rt56.1044.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-kvm-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-trace-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-trace-devel-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'kernel-rt-trace-kvm-3.10.0-1062.18.1.rt56.1044.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

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

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_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;
    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++;
  }
}

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, 'kernel-rt / kernel-rt-debug / kernel-rt-debug-devel / etc');
}
VendorProductVersionCPE
redhatenterprise_linuxkernel-rt-debug-develp-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel
redhatenterprise_linuxkernel-rt-docp-cpe:/a:redhat:enterprise_linux:kernel-rt-doc
redhatenterprise_linuxkernel-rt-debugp-cpe:/a:redhat:enterprise_linux:kernel-rt-debug
redhatenterprise_linuxkernel-rt-develp-cpe:/a:redhat:enterprise_linux:kernel-rt-devel
redhatenterprise_linuxkernel-rt-kvmp-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm
redhatenterprise_linux7cpe:/o:redhat:enterprise_linux:7
redhatenterprise_linuxkernel-rt-trace-kvmp-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm
redhatenterprise_linuxkernel-rt-trace-develp-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel
redhatenterprise_linuxkernel-rt-tracep-cpe:/a:redhat:enterprise_linux:kernel-rt-trace
redhatenterprise_linuxkernel-rtp-cpe:/a:redhat:enterprise_linux:kernel-rt
Rows per page:
1-10 of 111

CVSS2

8.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.7

Confidence

Low

EPSS

0.002

Percentile

52.6%