RHEL 7 : kernel-rt (RHSA-2019:2043)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:2043. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(127655);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/06");

  script_cve_id(
    "CVE-2018-7755",
    "CVE-2018-8087",
    "CVE-2018-9363",
    "CVE-2018-9516",
    "CVE-2018-9517",
    "CVE-2018-10853",
    "CVE-2018-13053",
    "CVE-2018-13093",
    "CVE-2018-13094",
    "CVE-2018-13095",
    "CVE-2018-14625",
    "CVE-2018-14734",
    "CVE-2018-15594",
    "CVE-2018-16658",
    "CVE-2018-16885",
    "CVE-2018-18281",
    "CVE-2019-3459",
    "CVE-2019-3460",
    "CVE-2019-3882",
    "CVE-2019-3900",
    "CVE-2019-5489",
    "CVE-2019-7222",
    "CVE-2019-9456",
    "CVE-2019-11599",
    "CVE-2019-11810",
    "CVE-2019-11833"
  );
  script_xref(name:"RHSA", value:"2019:2043");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"RHEL 7 : kernel-rt (RHSA-2019:2043)");

  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-rt is now available for Red Hat Enterprise Linux
7.

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-rt packages provide the Real Time Linux Kernel, which
enables fine-tuning for systems with extremely high determinism
requirements.

Security Fix(es) :

* Kernel: vhost_net: infinite loop while receiving packets leads to
DoS (CVE-2019-3900)

* Kernel: page cache side channel attacks (CVE-2019-5489)

* kernel: Buffer overflow in hidp_process_report (CVE-2018-9363)

* kernel: l2tp: Race condition between pppol2tp_session_create() and
l2tp_eth_create() (CVE-2018-9517)

* kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853)

* kernel: use-after-free Read in vhost_transport_send_pkt
(CVE-2018-14625)

* kernel: use-after-free in ucma_leave_multicast in
drivers/infiniband/core/ ucma.c (CVE-2018-14734)

* kernel: Mishandling of indirect calls weakens Spectre mitigation for
paravirtual guests (CVE-2018-15594)

* kernel: TLB flush happens too late on mremap (CVE-2018-18281)

* kernel: Heap address information leak while using L2CAP_GET_CONF_OPT
(CVE-2019-3459)

* kernel: Heap address information leak while using
L2CAP_PARSE_CONF_RSP (CVE-2019-3460)

* kernel: denial of service vector through vfio DMA mappings
(CVE-2019-3882)

* kernel: fix race condition between mmget_not_zero()/get_task_mm()
and core dumping (CVE-2019-11599)

* kernel: a NULL pointer dereference in drivers/scsi/megaraid/
megaraid_sas_base.c leading to DoS (CVE-2019-11810)

* kernel: fs/ext4/extents.c leads to information disclosure
(CVE-2019-11833)

* kernel: Information exposure in fd_locked_ioctl function in
drivers/block/ floppy.c (CVE-2018-7755)

* kernel: Memory leak in drivers/net/wireless/
mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of
service (CVE-2018-8087)

* kernel: HID: debug: Buffer overflow in hid_debug_events_read() in
drivers/ hid/hid-debug.c (CVE-2018-9516)

* kernel: Integer overflow in the alarm_timer_nsleep function
(CVE-2018-13053)

* kernel: NULL pointer dereference in lookup_slow function
(CVE-2018-13093)

* kernel: NULL pointer dereference in xfs_da_shrink_inode function
(CVE-2018-13094)

* kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c
(CVE-2018-13095)

* kernel: Information leak in cdrom_ioctl_drive_status
(CVE-2018-16658)

* kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885)

* Kernel: KVM: leak of uninitialized stack contents to guest
(CVE-2019-7222)

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

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.7 Release Notes linked from the References section.");
  # https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3395ff0b");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:2043");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-7755");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-8087");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-9363");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-9516");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-9517");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10853");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13053");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13093");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13094");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13095");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-14625");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-14734");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-15594");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-16658");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-16885");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-18281");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-3459");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-3460");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-3882");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-3900");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-5489");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-7222");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-9456");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-11599");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-11810");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-11833");
  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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-9517");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2018-9363");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo-common-x86_64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.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-2018-10853", "CVE-2018-13053", "CVE-2018-13093", "CVE-2018-13094", "CVE-2018-13095", "CVE-2018-14625", "CVE-2018-14734", "CVE-2018-15594", "CVE-2018-16658", "CVE-2018-16885", "CVE-2018-18281", "CVE-2018-7755", "CVE-2018-8087", "CVE-2018-9363", "CVE-2018-9516", "CVE-2018-9517", "CVE-2019-11599", "CVE-2019-11810", "CVE-2019-11833", "CVE-2019-3459", "CVE-2019-3460", "CVE-2019-3882", "CVE-2019-3900", "CVE-2019-5489", "CVE-2019-7222", "CVE-2019-9456");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2019:2043");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2019:2043";
  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", cpu:"x86_64", reference:"kernel-rt-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-debuginfo-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-devel-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-kvm-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-kvm-debuginfo-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debuginfo-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debuginfo-common-x86_64-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-devel-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", reference:"kernel-rt-doc-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-kvm-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-kvm-debuginfo-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-debuginfo-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-devel-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-kvm-3.10.0-1062.rt56.1022.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-kvm-debuginfo-3.10.0-1062.rt56.1022.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-rt / kernel-rt-debug / kernel-rt-debug-debuginfo / etc");
  }
}