RHEL 6 : kernel (RHSA-2018:1346) (Meltdown)

2018-05-09T00:00:00
ID REDHAT-RHSA-2018-1346.NASL
Type nessus
Reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-02T00:00:00

Description

An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es) :

  • hw: cpu: speculative execution permission faults handling (CVE-2017-5754, x86 32-bit)

  • Kernel: error in exception handling leads to DoS (CVE-2018-8897)

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

Red Hat would like to thank Google Project Zero for reporting CVE-2017-5754 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting CVE-2018-8897.

Bug Fix(es) :

  • The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554253)

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1346. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109636);
  script_version("1.17");
  script_cvs_date("Date: 2019/10/24 15:35:44");

  script_cve_id("CVE-2017-5754", "CVE-2018-8897");
  script_xref(name:"RHSA", value:"2018:1346");
  script_xref(name:"IAVA", value:"2018-A-0019");

  script_name(english:"RHEL 6 : kernel (RHSA-2018:1346) (Meltdown)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for kernel is now available for Red Hat Enterprise Linux 6.7
Extended Update Support.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es) :

* hw: cpu: speculative execution permission faults handling
(CVE-2017-5754, x86 32-bit)

* Kernel: error in exception handling leads to DoS (CVE-2018-8897)

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

Red Hat would like to thank Google Project Zero for reporting
CVE-2017-5754 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski
for reporting CVE-2018-8897.

Bug Fix(es) :

* The kernel build requirements have been updated to the GNU Compiler
Collection (GCC) compiler version that has the support for Retpolines.
The Retpolines mechanism is a software construct that leverages
specific knowledge of the underlying hardware to mitigate the branch
target injection, also known as Spectre variant 2 vulnerability
described in CVE-2017-5715. (BZ#1554253)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/vulnerabilities/pop_ss"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-5754"
  );
  # https://access.redhat.com/security/vulnerabilities/speculativeexecution
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?892ef523"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2018:1346"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-8897"
  );
  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: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:"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:'Microsoft Windows POP/MOV SS Local Privilege Elevation Vulnerability');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-abi-whitelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-i686");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-s390x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-x86_64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/09");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.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("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");
include("ksplice.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^6\.7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.7", "Red Hat " + os_ver);

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

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< 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");
  cve_list = make_list("CVE-2017-5754", "CVE-2018-8897");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2018:1346");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:1346";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", reference:"kernel-abi-whitelists-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debug-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debug-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debug-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debug-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debug-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debug-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debug-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debug-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debuginfo-common-i686-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", reference:"kernel-doc-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", reference:"kernel-firmware-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-headers-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-headers-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-headers-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-kdump-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-kdump-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-kdump-devel-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"perf-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"perf-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"perf-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"perf-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"perf-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"perf-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"python-perf-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"python-perf-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"python-perf-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"python-perf-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"python-perf-debuginfo-2.6.32-573.55.2.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"python-perf-debuginfo-2.6.32-573.55.2.el6")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-abi-whitelists / kernel-debug / etc");
  }
}