RHEL 6 : kernel (RHSA-2017:2429)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:2429. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102305);
  script_version("3.10");
  script_cvs_date("Date: 2019/10/24 15:35:43");

  script_cve_id("CVE-2017-7895");
  script_xref(name:"RHSA", value:"2017:2429");

  script_name(english:"RHEL 6 : kernel (RHSA-2017:2429)");
  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) :

* The NFSv2 and NFSv3 server implementations in the Linux kernel
through 4.10.13 lacked certain checks for the end of a buffer. A
remote attacker could trigger a pointer-arithmetic error or possibly
cause other unspecified impacts using crafted requests related to
fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c. (CVE-2017-7895, Important)

Red Hat would like to thank Ari Kauppi for reporting this issue.

Bug Fix(es) :

* If a VFC port became unmapped in the VIOS, it sometimes did not
respond with a CRQ init complete following the H_REG_CRQ() call. As a
consequence, scsi_block_requests were called until the init complete
occurred. If not, I /O requests were hung. The provided patch ensures
the host action stays set to IBMVFC_HOST_ACTION_TGT_DEL so that all
rports are moved into devloss state unless an init complete is
received. (BZ#1460210)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2017:2429"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-7895"
  );
  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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  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:"2017/04/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/09");
  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:"^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-2017-7895");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2017:2429");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2017:2429";
  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-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", reference:"kernel-abi-whitelists-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debug-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debug-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debug-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debug-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debug-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debug-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debug-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debug-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-debuginfo-common-i686-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", reference:"kernel-doc-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", reference:"kernel-firmware-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"kernel-headers-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-headers-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"kernel-headers-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-kdump-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-kdump-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"kernel-kdump-devel-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"perf-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"perf-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"perf-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"perf-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"perf-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"perf-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"python-perf-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"python-perf-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"python-perf-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"i686", reference:"python-perf-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"s390x", reference:"python-perf-debuginfo-2.6.32-573.45.1.el6")) flag++;
  if (rpm_check(release:"RHEL6", sp:"7", cpu:"x86_64", reference:"python-perf-debuginfo-2.6.32-573.45.1.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");
  }
}