RHEL 7 : kernel (RHSA-2017:0004)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:0004. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(96307);
  script_version("1.8");
  script_cvs_date("Date: 2019/10/24 15:35:42");

  script_cve_id("CVE-2016-8666");
  script_xref(name:"RHSA", value:"2017:0004");

  script_name(english:"RHEL 7 : kernel (RHSA-2017:0004)");
  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 7.1
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) :

* A flaw was found in the way the Linux kernel's networking subsystem
handled offloaded packets with multiple layers of encapsulation in the
GRO (Generic Receive Offload) code path. A remote attacker could use
this flaw to trigger unbounded recursion in the kernel that could lead
to stack corruption, resulting in a system crash. (CVE-2016-8666,
Important)

Bug Fix(es) :

* When a virtual machine (VM) with PCI-Passthrough interfaces was
recreated, the operating system rebooted. This update fixes the race
condition between the eventfd daemon and the virqfd daemon. As a
result, the operating system no longer reboots in the described
situation. (BZ#1391609)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2017:0004"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2016-8666"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");

  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:7.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/01/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/05");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 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\.1([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.1", "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-2016-8666");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2017:0004");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2017:0004";
  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:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", reference:"kernel-abi-whitelists-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-debug-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-debug-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-debug-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-debug-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-debug-devel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-debug-devel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-devel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-devel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", reference:"kernel-doc-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-headers-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-headers-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-kdump-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-kdump-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"kernel-kdump-devel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-tools-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-tools-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-tools-libs-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"kernel-tools-libs-devel-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"perf-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"perf-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"perf-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"perf-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"python-perf-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"python-perf-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"s390x", reference:"python-perf-debuginfo-3.10.0-229.46.1.el7")) flag++;
  if (rpm_check(release:"RHEL7", sp:"1", cpu:"x86_64", reference:"python-perf-debuginfo-3.10.0-229.46.1.el7")) 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");
  }
}