Vulnerabilities > CVE-2017-2629 - Improper Certificate Validation vulnerability in Haxx Curl

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(97342);
  script_version("3.4");
  script_cvs_date("Date: 2018/12/19 13:21:18");

  script_cve_id("CVE-2017-2629");

  script_name(english:"FreeBSD : cURL -- ocsp status validation error (311e4b1c-f8ee-11e6-9940-b499baebfeaf)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The cURL project reports :

SSL_VERIFYSTATUS ignored curl and libcurl support 'OCSP stapling',
also known as the TLS Certificate Status Request extension (using the
CURLOPT_SSL_VERIFYSTATUS option). When telling curl to use this
feature, it uses that TLS extension to ask for a fresh proof of the
server's certificate's validity. If the server doesn't support the
extension, or fails to provide said proof, curl is expected to return
an error. Due to a coding mistake, the code that checks for a test
success or failure, ends up always thinking there's valid proof, even
when there is none or if the server doesn't support the TLS extension
in question. Contrary to how it used to function and contrary to how
this feature is documented to work. This could lead to users not
detecting when a server's certificate goes invalid or otherwise be
mislead that the server is in a better shape than it is in reality."
  );
  # https://curl.haxx.se/docs/adv_20170222.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://curl.haxx.se/docs/CVE-2017-2629.html"
  );
  # https://vuxml.freebsd.org/freebsd/311e4b1c-f8ee-11e6-9940-b499baebfeaf.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?a62ac020"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:curl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/02/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"curl>=7.52.0<7.53.0")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201703-04.
#
# The advisory text is Copyright (C) 2001-2018 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(99011);
  script_version("3.2");
  script_cvs_date("Date: 2018/09/25  9:33:51");

  script_cve_id("CVE-2017-2629");
  script_xref(name:"GLSA", value:"201703-04");

  script_name(english:"GLSA-201703-04 : cURL: Certificate validation error");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-201703-04
(cURL: Certificate validation error)

    cURL and applications linked against libcurl support “OCSP
      stapling”, also known as the TLS Certificate Status Request extension
      (using the CURLOPT_SSL_VERIFYSTATUS option). When telling cURL to use
      this feature, it uses that TLS extension to ask for a fresh proof of the
      server’s certificate’s validity. If the server doesn’t support the
      extension, or fails to provide said proof, cURL is expected to return an
      error.
      Due to a coding mistake, the code that checks for a test success or
      failure, ends up always thinking there’s valid proof, even when there
      is none or if the server doesn’t support the TLS extension in question.
  
Impact :

    Due to the error, a user maybe does not detect when a server’s
      certificate goes invalid or otherwise be mislead that the server is in a
      better shape than it is in reality.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201703-04"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All cURL users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=net-misc/curl-7.53.0'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:curl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/28");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-misc/curl", unaffected:make_list("ge 7.53.0"), vulnerable:make_list("lt 7.53.0"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "cURL");
}

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

include("compat.inc");

if (description)
{
  script_id(101957);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2016-9586",
    "CVE-2016-9594",
    "CVE-2017-2629",
    "CVE-2017-7008",
    "CVE-2017-7009",
    "CVE-2017-7010",
    "CVE-2017-7013",
    "CVE-2017-7014",
    "CVE-2017-7015",
    "CVE-2017-7016",
    "CVE-2017-7017",
    "CVE-2017-7021",
    "CVE-2017-7022",
    "CVE-2017-7023",
    "CVE-2017-7024",
    "CVE-2017-7025",
    "CVE-2017-7026",
    "CVE-2017-7027",
    "CVE-2017-7028",
    "CVE-2017-7029",
    "CVE-2017-7031",
    "CVE-2017-7032",
    "CVE-2017-7033",
    "CVE-2017-7035",
    "CVE-2017-7036",
    "CVE-2017-7044",
    "CVE-2017-7045",
    "CVE-2017-7047",
    "CVE-2017-7050",
    "CVE-2017-7051",
    "CVE-2017-7054",
    "CVE-2017-7062",
    "CVE-2017-7067",
    "CVE-2017-7068",
    "CVE-2017-7069",
    "CVE-2017-7468",
    "CVE-2017-9417"
  );
  script_bugtraq_id(
    95019,
    95094,
    96382,
    97962,
    99482,
    99879,
    99880,
    99882,
    99883,
    99889
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-05-15-1");

  script_name(english:"macOS and Mac OS X Multiple Vulnerabilities (Security Update 2017-003)");
  script_summary(english:"Checks for the presence of Security Update 2017-003.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a macOS or Mac OS X security update that
fixes multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is running Mac OS X 10.10.5, Mac OS X 10.11.6, or
macOS 10.12.5 and is missing a security update. It is therefore,
affected by multiple vulnerabilities :

  - An overflow condition exists in the curl component in
    the dprintf_formatf() function that is triggered when
    handling floating point conversion. An unauthenticated,
    remote attacker can exploit this to cause a denial of
    service condition or the execution of arbitrary code.
    (CVE-2016-9586)

  - A flaw exits in the curl component in the randit()
    function within file lib/rand.c due to improper
    initialization of the 32-bit random value, which is
    used, for example, to generate Digest and NTLM
    authentication nonces, resulting in weaker cryptographic
    operations than expected. (CVE-2016-9594)

  - A flaw exists in the curl component in the
    allocate_conn() function in lib/url.c when using the
    OCSP stapling feature for checking a X.509 certificate
    revocation status. The issue is triggered as the request
    option for OCSP stapling is not properly passed to the
    TLS library, resulting in no error being returned even
    when no proof of the validity of the certificate could
    be provided. A man-in-the-middle attacker can exploit
    this to provide a revoked certificate. (CVE-2017-2629)

  - A remote code execution vulnerability exists in the
    CoreAudio component due to improper validation of
    user-supplied input when handling movie files. An
    unauthenticated, remote attacker can exploit this, by
    convincing a user to play a specially crafted movie
    file, to cause a denial of service condition or the
    execution of arbitrary code. (CVE-2017-7008)

  - A memory corruption issue exists in the IOUSBFamily
    component due to improper validation of user-supplied
    input. A local attacker can exploit this, via a
    specially crafted application, to cause a denial of
    service condition or the execution of arbitrary code.
    (CVE-2017-7009)

  - Multiple out-of-bounds read errors exist in the libxml2
    component due to improper handling of specially crafted
    XML documents. An unauthenticated, remote attacker can
    exploit these to disclose user information.
    (CVE-2017-7010, CVE-2017-7013)

  - Multiple memory corruption issues exist in the Intel
    Graphics Driver component due to improper validation of
    input. A local attacker can exploit these issues to
    execute arbitrary code with elevated privileges.
    (CVE-2017-7014, CVE-2017-7017, CVE-2017-7035,
    CVE-2017-7044)

  - A remote code execution vulnerability exists in the
    Audio component due to improper validation of
    user-supplied input when handling audio files. An
    unauthenticated, remote attacker can exploit this, by
    convincing a user to play a specially crafted audio
    file, to execute arbitrary code. (CVE-2017-7015)

  - Multiple remote code execution vulnerabilities exist in
    the afclip component due to improper validation of
    user-supplied input when handling audio files. An
    unauthenticated, remote attacker can exploit these
    vulnerabilities, by convincing a user to play a
    specially crafted audio file, to execute arbitrary
    code. (CVE-2017-7016, CVE-2017-7033)

  - A memory corruption issue exists in the
    AppleGraphicsPowerManagement component due to improper
    validation of input. A local attacker can exploit this
    to cause a denial of service condition or the execution
    of arbitrary code with system privileges.
    (CVE-2017-7021)

  - Multiple memory corruption issues exist in the kernel
    due to improper validation of input. A local attacker
    can exploit these issues to cause a denial of service
    condition or the execution of arbitrary code with system
    privileges. (CVE-2017-7022, CVE-2017-7024,
    CVE-2017-7026)

  - Multiple memory corruption issues exist in the kernel
    due to improper validation of input. A local attacker
    can exploit these issues to cause a denial of service
    condition or the execution of arbitrary code with kernel
    privileges. (CVE-2017-7023, CVE-2017-7025,
    CVE-2017-7027, CVE-2017-7069)

  - Multiple unspecified flaws exist in the kernel due to a
    failure to properly sanitize input. A local attacker can
    exploit these issues, via a specially crafted
    application, to disclose restricted memory contents.
    (CVE-2017-7028, CVE-2017-7029, CVE-2017-7067)

  - A flaw exists in the Foundation component due to
    improper validation of input. A unauthenticated, remote
    attacker can exploit this, by convincing a user to open
    specially crafted file, to execute arbitrary code.
    (CVE-2017-7031)

  - A memory corruption issue exists in the 'kext tools'
    component due to improper validation of input. A local
    attacker can exploit this to execute arbitrary code with
    elevated privileges. (CVE-2017-7032)

  - Multiple unspecified flaws exist in the Intel Graphics
    Driver component due to a failure to properly sanitize
    input. A local attacker can exploit these issues, via a
    specially crafted application, to disclose restricted
    memory contents. (CVE-2017-7036, CVE-2017-7045)

  - A memory corruption issue exists in the libxpc component
    due to improper validation of input. A local attacker
    can exploit this issue, via a specifically crafted
    application, to cause a denial of service condition or
    the execution of arbitrary code with system privileges.
    (CVE-2017-7047)

  - Multiple memory corruption issues exist in the
    Bluetooth component due to improper validation of input.
    A local attacker can exploit these issues to execute
    arbitrary code with system privileges. (CVE-2017-7050,
    CVE-2017-7051)

  - A memory corruption issue exists in the Bluetooth
    component due to improper validation of input. A local
    attacker can exploit these issues to execute arbitrary
    code with system privileges. (CVE-2017-7054)

  - A buffer overflow condition exists in the Contacts
    component due to improper validation of user-supplied
    input. An unauthenticated, remote attacker can exploit
    this to cause a denial of service condition or the
    execution of arbitrary code. (CVE-2017-7062)

  - A buffer overflow condition exists in the libarchive
    component due to improper validation of user-supplied
    input. An unauthenticated, remote attacker can exploit
    this, via a specially crafted archive file, to cause a
    denial of service condition or the execution of
    arbitrary code. (CVE-2017-7068)

  - A certificate validation bypass vulnerability exists in
    the curl component due to the program attempting to
    resume TLS sessions even if the client certificate
    fails. An unauthenticated, remote attacker can exploit
    this to bypass validation mechanisms. (CVE-2017-7468)

  - A memory corruption issue exists in the Broadcom BCM43xx
    family Wi-Fi Chips component that allows an
    unauthenticated, remote attacker to execute arbitrary
    code. (CVE-2017-9417)");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207922");
  script_set_attribute(attribute:"see_also", value:"http://seclists.org/fulldisclosure/2017/May/47");
  script_set_attribute(attribute:"solution", value:
"Install Security Update 2017-003 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:R/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-2017-7069");

  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:"2016/07/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:macos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "Host/MacOSX/packages/boms");

  exit(0);
}

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

# Compare 2 patch numbers to determine if patch requirements are satisfied.
# Return true if this patch or a later patch is applied
# Return false otherwise
function check_patch(year, number)
{
  local_var p_split = split(patch, sep:"-");
  local_var p_year  = int( p_split[0]);
  local_var p_num   = int( p_split[1]);

  if (year >  p_year) return TRUE;
  else if (year <  p_year) return FALSE;
  else if (number >=  p_num) return TRUE;
  else return FALSE;
}

get_kb_item_or_exit("Host/local_checks_enabled");
os = get_kb_item_or_exit("Host/MacOSX/Version");

if (!preg(pattern:"Mac OS X 10\.(10\.5|11\.6|12\.5)([^0-9]|$)", string:os))
  audit(AUDIT_OS_NOT, "Mac OS X 10.10.5 or Mac OS X 10.11.6 or Mac OS X 10.12.5");

if ("10.10.5" >< os || "10.11.6" >< os || "10.12.5" >< os) patch = "2017-003";

packages = get_kb_item_or_exit("Host/MacOSX/packages/boms", exit_code:1);
sec_boms_report = pgrep(
  pattern:"^com\.apple\.pkg\.update\.(security\.|os\.SecUpd).*bom$",
  string:packages
);
sec_boms = split(sec_boms_report, sep:'\n');

foreach package (sec_boms)
{
  # Grab patch year and number
  match = eregmatch(pattern:"[^0-9](20[0-9][0-9])[-.]([0-9]{3})[^0-9]", string:package);
  if (empty_or_null(match[1]) || empty_or_null(match[2]))
    continue;

  patch_found = check_patch(year:int(match[1]), number:int(match[2]));
  if (patch_found) exit(0, "The host has Security Update " + patch + " or later installed and is therefore not affected.");
}

report =  '\n  Missing security update : ' + patch;
report += '\n  Installed security BOMs : ';
if (sec_boms_report) report += str_replace(find:'\n', replace:'\n                            ', string:sec_boms_report);
else report += 'n/a';
report += '\n';

security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);