RHEL 6 : kernel (RHSA-2018:1319) (Meltdown)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:1319. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(109634);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/28");

  script_cve_id("CVE-2017-1000410", "CVE-2017-13166", "CVE-2017-18017", "CVE-2017-5754", "CVE-2017-7645", "CVE-2017-8824", "CVE-2018-8897");
  script_xref(name:"RHSA", value:"2018:1319");

  script_name(english:"RHEL 6 : kernel (RHSA-2018:1319) (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.

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)

* kernel: nfsd: Incorrect handling of long RPC replies (CVE-2017-7645)

* kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824)

* kernel: v4l2: disabled memory access protection mechanism allowing
privilege escalation (CVE-2017-13166)

* kernel: netfilter: use-after-free in tcpmss_mangle_packet function
in net/ netfilter/xt_TCPMSS.c (CVE-2017-18017)

* kernel: Stack information leak in the EFS element (CVE-2017-1000410)

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; Nick Peterson (Everdox Tech LLC) and Andy Lutomirski
for reporting CVE-2018-8897; Mohamed Ghannam for reporting
CVE-2017-8824; and Armis Labs for reporting CVE-2017-1000410.

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/3431591"
  );
  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/articles/3431591"
  );
  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-2018:1319"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-7645"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-8824"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-13166"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-18017"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-1000410"
  );
  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:N/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:N/AC:L/PR:N/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");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/04/18");
  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_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2022 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([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x", "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-2017-1000410", "CVE-2017-13166", "CVE-2017-18017", "CVE-2017-5754", "CVE-2017-7645", "CVE-2017-8824", "CVE-2018-8897");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2018:1319");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:1319";
  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", cpu:"i686", reference:"kernel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"kernel-abi-whitelists-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debug-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debug-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debug-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debug-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debug-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debug-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debug-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debug-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-debuginfo-common-i686-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"kernel-doc-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"kernel-firmware-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"kernel-headers-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-headers-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"kernel-headers-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-kdump-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-kdump-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"kernel-kdump-devel-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"perf-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"perf-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"perf-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"perf-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"perf-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"perf-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"python-perf-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"python-perf-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"python-perf-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"python-perf-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"python-perf-debuginfo-2.6.32-696.28.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"python-perf-debuginfo-2.6.32-696.28.1.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");
  }
}