RHEL 7 : kernel (RHSA-2018:1129) (Meltdown) (Spectre)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1129. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109115);
  script_version("1.8");
  script_cvs_date("Date: 2019/10/24 15:35:44");

  script_cve_id("CVE-2017-5715", "CVE-2017-5753", "CVE-2017-5754");
  script_xref(name:"RHSA", value:"2018:1129");

  script_name(english:"RHEL 7 : kernel (RHSA-2018:1129) (Meltdown) (Spectre)");
  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 7.3
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) :

* An industry-wide issue was found in the way many modern
microprocessor designs have implemented speculative execution of
instructions (a commonly used performance optimization). There are
three primary variants of the issue which differ in the way the
speculative execution can be exploited. Variant CVE-2017-5754 relies
on the fact that, on impacted microprocessors, during speculative
execution of instruction permission faults, exception generation
triggered by a faulting access is suppressed until the retirement of
the whole instruction block. In a combination with the fact that
memory accesses may populate the cache even when the block is being
dropped and never committed (executed), an unprivileged local attacker
could use this flaw to read privileged (kernel space) memory by
conducting targeted cache side-channel attacks. (CVE-2017-5754,
Important, KVM for Power)

Red Hat would like to thank Google Project Zero for reporting this
issue.

Bug Fix(es) :

These updated kernel packages include also numerous bug fixes. Space
precludes documenting all of these bug fixes in this advisory. See the
bug fix descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3413511"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/articles/3413511"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2018:1129"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-5715"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-5753"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-5754"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");
  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:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  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-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-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:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs-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:7.3");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/18");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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:"^7\.3([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.3", "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-2017-5715", "CVE-2017-5753", "CVE-2017-5754");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2018:1129");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:1129";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", reference:"kernel-abi-whitelists-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-debug-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-debug-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-debug-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-debug-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-debug-devel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-debug-devel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-devel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-devel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", reference:"kernel-doc-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-headers-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-headers-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-kdump-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-kdump-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"kernel-kdump-devel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-tools-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-tools-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-tools-libs-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"kernel-tools-libs-devel-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"perf-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"perf-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"perf-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"perf-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"python-perf-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"python-perf-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"s390x", reference:"python-perf-debuginfo-3.10.0-514.48.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"3", cpu:"x86_64", reference:"python-perf-debuginfo-3.10.0-514.48.1.el7")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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");
  }
}