Vulnerabilities > CVE-2019-10873 - NULL Pointer Dereference vulnerability in Freedesktop Poppler 0.74.0

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4042-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(126375);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/08");

  script_cve_id("CVE-2017-9865", "CVE-2018-18897", "CVE-2018-20662", "CVE-2019-10018", "CVE-2019-10019", "CVE-2019-10021", "CVE-2019-10023", "CVE-2019-10872", "CVE-2019-10873", "CVE-2019-12293", "CVE-2019-9200", "CVE-2019-9631", "CVE-2019-9903");
  script_xref(name:"USN", value:"4042-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 18.10 / 19.04 : poppler vulnerabilities (USN-4042-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that poppler incorrectly handled certain files. If a
user or automated system were tricked into opening a crafted PDF file,
an attacker could cause a denial of service, or possibly execute
arbitrary code.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/4042-1/"
  );
  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: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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpoppler58");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpoppler73");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpoppler79");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpoppler85");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:poppler-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(16\.04|18\.04|18\.10|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 18.10 / 19.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"16.04", pkgname:"libpoppler58", pkgver:"0.41.0-0ubuntu1.14")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"poppler-utils", pkgver:"0.41.0-0ubuntu1.14")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libpoppler73", pkgver:"0.62.0-2ubuntu2.9")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"poppler-utils", pkgver:"0.62.0-2ubuntu2.9")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"libpoppler79", pkgver:"0.68.0-0ubuntu1.7")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"poppler-utils", pkgver:"0.68.0-0ubuntu1.7")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"libpoppler85", pkgver:"0.74.0-0ubuntu1.2")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"poppler-utils", pkgver:"0.74.0-0ubuntu1.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libpoppler58 / libpoppler73 / libpoppler79 / libpoppler85 / etc");
}

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(123511);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/30 13:24:46");

  script_cve_id(
    "CVE-2019-7310",
    "CVE-2019-9200",
    "CVE-2019-10871",
    "CVE-2019-10872",
    "CVE-2019-10873"
  );

  script_name(english:"Poppler <= 0.74.0 Multiple Vulnerabilities");
  script_summary(english:"Checks for an installation of poppler.");

  script_set_attribute(attribute:"synopsis", value:
"A package installed on the remote host is affected by multiple
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Poppler installed on the remote host is prior or
equal to 0.74.0. It is, therefore, affected by the following
vulnerabilities :

  - Multiple input-validation flaws exist that allow heap
    buffer overflows leading to application crashes and
    other unspecified impact. (CVE-2019-7310,
    CVE-2019-9200, CVE-2019-10871, CVE-2019-10872)

  - A flaw exists related to the function
    'SplashClip::clipAALine' at 'splash/SplashClip.cc' that
    allows a NULL pointer dereference leading to
    application crashes and other unspecified impact.
    (CVE-2019-10873)

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://gitlab.freedesktop.org/poppler/poppler/issues/717");
  script_set_attribute(attribute:"see_also", value:"https://gitlab.freedesktop.org/poppler/poppler/issues/728");
  script_set_attribute(attribute:"solution", value:
"Upgrade to a patched version of Poppler once it is available.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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:R/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-2019-9200");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/25");
  script_set_attribute(attribute:"patch_publication_date",value:"2018/12/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:freedesktop:poppler");
  script_set_attribute(attribute:"agent", value:"unix");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("ssh_get_info.nasl", "macosx_eval_installed.nbin");
  script_require_keys("Host/local_checks_enabled");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");

distros = make_list(
  "Host/AIX/lslpp",
  "Host/CentOS/rpm-list",
  "Host/Gentoo/qpkg-list",
  "Host/HP-UX/swlist",
  "Host/MacOSX/packages",
  "MacOSX/packages/homebrew",
  "Host/McAfeeLinux/rpm-list",
  "Host/RedHat/rpm-list",
  "Host/Slackware/packages",
  "Host/Solaris/showrev",
  "Host/Solaris11/pkg-list",
  "Host/SuSE/rpm-list"
);

pkgs_list = make_array();

distro = "";

foreach pkgmgr (distros)
{
  pkgs = get_kb_item(pkgmgr);
  if(pkgmgr=~"^MacOSX") sep = "|";
  else sep = '\n';
  if(!isnull(pkgs) && "poppler" >< pkgs)
  {
    # so we know what distro we're looking at
    # helps for version compares
    distro = pkgmgr;
    foreach pkg (split(pkgs,sep:sep,keep:FALSE))
    {
      match = pregmatch(pattern:"(?:lib\d*|gir1.2-|\s|^)poppler\d*(?:-?(?:glib[^-]{0,2}|qt[^-]{0,2}|utils|dbg|dbgsym|debuginfo|private|devel|cpp[^-]{0,2}|gir[^-]+|dev|-0\.18|<|-\d|.x86-64)+)*(?:-|\s*)(\d+(?:\.\d+){1,2}(?:-[0-9]+)?)[^\n]*", string:pkg);
      if(!empty_or_null(match) && !empty_or_null(match[1]))
      {
        if("-" >< match[1])
          pkgs_list[pkg] = str_replace(string: match[1], find:'-', replace:'.');
        else pkgs_list[pkg] = match[1];
      }
    }
  }
}

paranoid_report=FALSE;
flag = 0;
vulnerable_pkgs = "";

if(!empty_or_null(pkgs_list))
{
  foreach pkg (keys(pkgs_list))
  {
    ver = pkgs_list[pkg];
    if ((empty_or_null(ver)) || (ver !~ "(?!^.*\.\..*$)^[0-9][0-9.]+?$")) continue;
    if(
        ("el7" >< pkg && ver_compare(ver:ver, fix:"0.26.5.20", strict:FALSE)<=0)
        # el6 and el5 are not affected as per https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-9200
      )
      {
        vulnerable_pkgs += '  ' + pkg + '\n';
        flag++;
        paranoid_report = TRUE;
      }
      # these distros don't appear to have backported versions
      # <= 0 since there's no fixed version out yet
    else if(
      distro =~ "(Solaris|Solaris11|Gentoo|BSD|Slackware|HP-UX|AIX|McAfeeLinux|MacOSX)" &&
      ver_compare(ver:ver, fix:"0.74.0", strict:FALSE) <= 0
    )
    {
      vulnerable_pkgs += '  ' + pkg + '\n';
      flag++;
    }
  }
}
else audit(AUDIT_NOT_INST, "poppler");

if(paranoid_report && report_paranoia < 2)
  exit(0, "Potentially vulnerable packages were found, but the plugin will only report if 'Report paranoia' is set to 'Paranoid', due to potentially inaccurate backported versions.");

if(flag > 0)
{
  report = '\nThe following packages are associated with a vulnerable version of poppler : \n\n';
  report += vulnerable_pkgs;
  report += '\nFix : Upgrade poppler to a fixed release.\n';
  security_report_v4(severity:SECURITY_WARNING, extra:report, port:0);
}
else audit(AUDIT_INST_VER_NOT_VULN, "poppler");