Oracle Linux 7 : elfutils (ELSA-2019-2197)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2019-2197.
##

include('compat.inc');

if (description)
{
  script_id(180848);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/07");

  script_cve_id(
    "CVE-2018-16062",
    "CVE-2018-16402",
    "CVE-2018-16403",
    "CVE-2018-18310",
    "CVE-2018-18520",
    "CVE-2018-18521",
    "CVE-2019-7149",
    "CVE-2019-7150",
    "CVE-2019-7664",
    "CVE-2019-7665"
  );

  script_name(english:"Oracle Linux 7 : elfutils (ELSA-2019-2197)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2019-2197 advisory.

  - dwarf_getaranges in dwarf_getaranges.c in libdw in elfutils before 2018-08-18 allows remote attackers to
    cause a denial of service (heap-based buffer over-read) via a crafted file. (CVE-2018-16062)

  - libelf/elf_end.c in elfutils 0.173 allows remote attackers to cause a denial of service (double free and
    application crash) or possibly have unspecified other impact because it tries to decompress twice.
    (CVE-2018-16402)

  - libdw in elfutils 0.173 checks the end of the attributes list incorrectly in dwarf_getabbrev in
    dwarf_getabbrev.c and dwarf_hasattr in dwarf_hasattr.c, leading to a heap-based buffer over-read and an
    application crash. (CVE-2018-16403)

  - An Invalid Memory Address Dereference exists in the function elf_end in libelf in elfutils through v0.174.
    Although eu-size is intended to support ar files inside ar files, handle_ar in size.c closes the outer ar
    file before handling all inner entries. The vulnerability allows attackers to cause a denial of service
    (application crash) with a crafted ELF file. (CVE-2018-18520)

  - In elfutils 0.175, a heap-based buffer over-read was discovered in the function elf32_xlatetom in
    elf32_xlatetom.c in libelf. A crafted ELF input can cause a segmentation fault leading to denial of
    service (program crash) because ebl_core_note does not reject malformed core file notes. (CVE-2019-7665)

  - An invalid memory address dereference was discovered in dwfl_segment_report_module.c in libdwfl in
    elfutils through v0.174. The vulnerability allows attackers to cause a denial of service (application
    crash) with a crafted ELF file, as demonstrated by consider_notes. (CVE-2018-18310)

  - Divide-by-zero vulnerabilities in the function arlib_add_symbols() in arlib.c in elfutils 0.174 allow
    remote attackers to cause a denial of service (application crash) with a crafted ELF file, as demonstrated
    by eu-ranlib, because a zero sh_entsize is mishandled. (CVE-2018-18521)

  - A heap-based buffer over-read was discovered in the function read_srclines in dwarf_getsrclines.c in libdw
    in elfutils 0.175. A crafted input can cause segmentation faults, leading to denial-of-service, as
    demonstrated by eu-nm. (CVE-2019-7149)

  - An issue was discovered in elfutils 0.175. A segmentation fault can occur in the function elf64_xlatetom
    in libelf/elf32_xlatetom.c, due to dwfl_segment_report_module not checking whether the dyn data read from
    a core file is truncated. A crafted input can cause a program crash, leading to denial-of-service, as
    demonstrated by eu-stack. (CVE-2019-7150)

  - In elfutils 0.175, a negative-sized memcpy is attempted in elf_cvt_note in libelf/note_xlate.h because of
    an incorrect overflow check. Crafted elf input causes a segmentation fault, leading to denial of service
    (program crash). (CVE-2019-7664)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://linux.oracle.com/errata/ELSA-2019-2197.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-16402");

  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:"2018/08/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-default-yama-scope");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-devel-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-libelf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-libelf-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-libelf-devel-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:elfutils-libs");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Oracle Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var pkgs = [
    {'reference':'elfutils-default-yama-scope-0.176-2.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-devel-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-devel-static-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-devel-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-devel-static-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libs-0.176-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-devel-0.176-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-devel-static-0.176-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-0.176-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-devel-0.176-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-devel-static-0.176-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libs-0.176-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-devel-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-devel-static-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-devel-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libelf-devel-static-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'elfutils-libs-0.176-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = 'EL' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release) {
    if (exists_check) {
        if (rpm_exists(release:_release, rpm:exists_check) && rpm_check(release:_release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    } else {
        if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
    }
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'elfutils / elfutils-default-yama-scope / elfutils-devel / etc');
}