Vulnerabilities > CVE-2019-18805 - Integer Overflow or Wraparound vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2020:0740. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(134361);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2018-16871", "CVE-2019-11884", "CVE-2019-15030", "CVE-2019-15916", "CVE-2019-17666", "CVE-2019-18805", "CVE-2019-3459", "CVE-2019-3460");
  script_xref(name:"RHSA", value:"2020:0740");

  script_name(english:"RHEL 7 : kernel-alt (RHSA-2020:0740)");
  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-alt 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-alt packages provide the Linux kernel version 4.x.

Security Fix(es) :

* kernel: rtl_p2p_noa_ie in drivers/net/wireless/realtek/rtlwifi/ps.c
in the Linux kernel lacks a certain upper-bound check, leading to a
buffer overflow (CVE-2019-17666)

* kernel: nfs: NULL pointer dereference due to an anomalized NFS
message sequence (CVE-2018-16871)

* 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: sensitive information disclosure from kernel stack memory
via HIDPCONNADD command (CVE-2019-11884)

* kernel: powerpc: local user can read vector registers of other
users' processes via a Facility Unavailable exception (CVE-2019-15030)

* kernel: memory leak in register_queue_kobjects() in
net/core/net-sysfs.c leads to denial of service (CVE-2019-15916)

* kernel: integer overflow in tcp_ack_update_rtt in
net/ipv4/tcp_input.c (CVE-2019-18805)

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.

Bug Fix(es) :

* lpfc: NVMe/FC target test machine rhel-storage-62 crashes on boot
when connected to FC switch (BZ#1623205)

* kernel BUG at fs/nfs_common/grace.c:107! (BZ#1637543)

* RHEL-Alt-7.6 - Need a fix for kernel bug cap_inode_getsecurity: use
d_find_any_alias() instead of d_find_alias() (BZ#1711934)

* Backport 'fs/dcache.c: add cond_resched() in shrink_dentry_list()'
(32785c0539b7) [rhel-alt-7.6.z] (BZ#1758861)

* [RHEL-ALT-7.6.z][arm64] iommu/iova: Fix tracking of recently failed
iova address (BZ#1780500)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2020:0740"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-16871"
  );
  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-2019-11884"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2019-15030"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2019-15916"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2019-17666"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2019-18805"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/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:A/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:"cvss_score_source", value:"CVE-2019-17666");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  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-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: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");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 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([^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-2018-16871", "CVE-2019-11884", "CVE-2019-15030", "CVE-2019-15916", "CVE-2019-17666", "CVE-2019-18805", "CVE-2019-3459", "CVE-2019-3460");
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2020:0740");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2020:0740";
  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:"s390x", reference:"kernel-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", reference:"kernel-abi-whitelists-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debug-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debug-debuginfo-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debug-devel-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debuginfo-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-devel-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", reference:"kernel-doc-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-headers-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-kdump-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-kdump-debuginfo-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-kdump-devel-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"perf-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"perf-debuginfo-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"python-perf-4.14.0-115.18.1.el7a")) flag++;
  if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"python-perf-debuginfo-4.14.0-115.18.1.el7a")) 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");
  }
}