RHEL 7 : kernel-rt (RHSA-2018:3096)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:3096. The text 
# itself is copyright (C) Red Hat, Inc.
#

include('compat.inc');

if (description)
{
  script_id(118528);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/23");

  script_cve_id(
    "CVE-2015-8830",
    "CVE-2016-4913",
    "CVE-2017-0861",
    "CVE-2017-10661",
    "CVE-2017-17805",
    "CVE-2017-18208",
    "CVE-2017-18232",
    "CVE-2017-18344",
    "CVE-2017-18360",
    "CVE-2018-1092",
    "CVE-2018-1094",
    "CVE-2018-1118",
    "CVE-2018-1120",
    "CVE-2018-1130",
    "CVE-2018-5344",
    "CVE-2018-5391",
    "CVE-2018-5803",
    "CVE-2018-5848",
    "CVE-2018-7740",
    "CVE-2018-7757",
    "CVE-2018-8781",
    "CVE-2018-10322",
    "CVE-2018-10878",
    "CVE-2018-10879",
    "CVE-2018-10881",
    "CVE-2018-10883",
    "CVE-2018-10902",
    "CVE-2018-10940",
    "CVE-2018-13405",
    "CVE-2018-18690",
    "CVE-2018-1000026"
  );
  script_xref(name:"RHSA", value:"2018:3096");

  script_name(english:"RHEL 7 : kernel-rt (RHSA-2018:3096)");

  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) :

* A flaw named FragmentSmack was found in the way the Linux kernel
handled reassembly of fragmented IPv4 and IPv6 packets. A remote
attacker could use this flaw to trigger time and calculation expensive
fragment reassembly algorithm by sending specially crafted packets
which could lead to a CPU saturation and hence a denial of service on
the system. (CVE-2018-5391)

* kernel: out-of-bounds access in the show_timer function in
kernel/time/ posix-timers.c (CVE-2017-18344)

* kernel: Integer overflow in udl_fb_mmap() can allow attackers to
execute code in kernel space (CVE-2018-8781)

* kernel: MIDI driver race condition leads to a double-free
(CVE-2018-10902)

* kernel: Missing check in inode_init_owner() does not clear SGID bit
on non-directories for non-members (CVE-2018-13405)

* kernel: AIO write triggers integer overflow in some protocols
(CVE-2015-8830)

* kernel: Use-after-free in snd_pcm_info function in ALSA subsystem
potentially leads to privilege escalation (CVE-2017-0861)

* kernel: Handling of might_cancel queueing is not properly pretected
against race (CVE-2017-10661)

* kernel: Salsa20 encryption algorithm does not correctly handle
zero-length inputs allowing local attackers to cause denial of service
(CVE-2017-17805)

* kernel: Inifinite loop vulnerability in madvise_willneed() function
allows local denial of service (CVE-2017-18208)

* kernel: fuse-backed file mmap-ed onto process cmdline arguments
causes denial of service (CVE-2018-1120)

* kernel: a NULL pointer dereference in dccp_write_xmit() leads to a
system crash (CVE-2018-1130)

* kernel: drivers/block/loop.c mishandles lo_release serialization
allowing denial of service (CVE-2018-5344)

* kernel: Missing length check of payload in _sctp_make_chunk()
function allows denial of service (CVE-2018-5803)

* kernel: buffer overflow in drivers/net/wireless/ath/wil6210/
wmi.c:wmi_set_ie() may lead to memory corruption (CVE-2018-5848)

* kernel: out-of-bound write in ext4_init_block_bitmap function with a
crafted ext4 image (CVE-2018-10878)

* kernel: Improper validation in bnx2x network card driver can allow
for denial of service attacks via crafted packet (CVE-2018-1000026)

* kernel: Information leak when handling NM entries containing NUL
(CVE-2016-4913)

* kernel: Mishandling mutex within libsas allowing local Denial of
Service (CVE-2017-18232)

* kernel: NULL pointer dereference in ext4_process_freed_data() when
mounting crafted ext4 image (CVE-2018-1092)

* kernel: NULL pointer dereference in ext4_xattr_inode_hash() causes
crash with crafted ext4 image (CVE-2018-1094)

* kernel: vhost: Information disclosure in vhost.c:vhost_new_msg()
(CVE-2018-1118)

* kernel: Denial of service in resv_map_release function in
mm/hugetlb.c (CVE-2018-7740)

* kernel: Memory leak in the sas_smp_get_phy_events function in
drivers/scsi/ libsas/sas_expander.c (CVE-2018-7757)

* kernel: Invalid pointer dereference in xfs_ilock_attr_map_shared()
when mounting crafted xfs image allowing denial of service
(CVE-2018-10322)

* kernel: use-after-free detected in ext4_xattr_set_entry with a
crafted file (CVE-2018-10879)

* kernel: out-of-bound access in ext4_get_group_info() when mounting
and operating a crafted ext4 image (CVE-2018-10881)

* kernel: stack-out-of-bounds write in jbd2_journal_dirty_metadata
function (CVE-2018-10883)

* kernel: incorrect memory bounds check in drivers/cdrom/cdrom.c
(CVE-2018-10940)

Red Hat would like to thank Juha-Matti Tilli (Aalto University -
Department of Communications and Networking and Nokia Bell Labs) for
reporting CVE-2018-5391; Trend Micro Zero Day Initiative for reporting
CVE-2018-10902; Qualys Research Labs for reporting CVE-2018-1120;
Evgenii Shatokhin (Virtuozzo Team) for reporting CVE-2018-1130; and
Wen Xu for reporting CVE-2018-1092 and CVE-2018-1094.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/articles/3553061");
  # 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-2018:3096");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2015-8830");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2016-4913");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-0861");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-10661");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-17805");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-18208");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-18232");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-18344");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2017-18360");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1092");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1094");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1118");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1120");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1130");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-5344");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-5391");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-5803");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-5848");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-7740");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-7757");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-8781");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10322");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10878");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10879");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10881");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10883");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10902");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-10940");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13405");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-18690");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-1000026");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/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:L/AC:L/PR:L/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:"cvss_score_source", value:"CVE-2017-10661");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2018-8781");

  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:"vuln_publication_date", value:"2016/05/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
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  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");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
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  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");
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  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) 2018-2023 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-2015-8830", "CVE-2016-4913", "CVE-2017-0861", "CVE-2017-10661", "CVE-2017-17805", "CVE-2017-18208", "CVE-2017-18232", "CVE-2017-18344", "CVE-2017-18360", "CVE-2018-1000026", "CVE-2018-10322", "CVE-2018-10878", "CVE-2018-10879", "CVE-2018-10881", "CVE-2018-10883", "CVE-2018-10902", "CVE-2018-1092", "CVE-2018-1094", "CVE-2018-10940", "CVE-2018-1118", "CVE-2018-1120", "CVE-2018-1130", "CVE-2018-13405", "CVE-2018-18690", "CVE-2018-5344", "CVE-2018-5391", "CVE-2018-5803", "CVE-2018-5848", "CVE-2018-7740", "CVE-2018-7757", "CVE-2018-8781");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2018:3096");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:3096";
  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-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-debuginfo-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-devel-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-kvm-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-kvm-debuginfo-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debuginfo-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debuginfo-common-x86_64-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-devel-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", reference:"kernel-rt-doc-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-kvm-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-kvm-debuginfo-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-debuginfo-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-devel-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-kvm-3.10.0-957.rt56.910.el7")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-kvm-debuginfo-3.10.0-957.rt56.910.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");
  }
}