Vulnerabilities > CVE-2017-7136 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Xcode

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
apple
CWE-119
nessus
NVD
Published: 2017-10-23
Updated: 2017-10-27

Summary

An issue was discovered in certain Apple products. Xcode before 9 is affected. The issue involves the "ld64" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted Mach-O file.

Vulnerable Configurations

Part Description Count
Application
Apple
69

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyMacOS X Local Security Checks
NASL idMACOSX_XCODE_9.NASL
descriptionThe version of Apple Xcode installed on the remote macOS or Mac OS X host is prior to 9.0. It is, therefore, affected by multiple remote code execution vulnerabilities in the git, Id64, and subversion components. An unauthenticated, remote attacker can exploit these vulnerabilities to cause execution of arbitrary code.
last seen2020-05-06
modified2017-09-20
plugin id103359
published2017-09-20
reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/103359
titleApple Xcode < 9.0 Multiple RCE (macOS)
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(103359);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/05");

  script_cve_id(
    "CVE-2017-7076",
    "CVE-2017-7134",
    "CVE-2017-7135",
    "CVE-2017-7136",
    "CVE-2017-7137",
    "CVE-2017-9800",
    "CVE-2017-1000117"
  );
  script_bugtraq_id(100259, 100283, 100894);
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-09-19-3");

  script_name(english:"Apple Xcode < 9.0 Multiple RCE (macOS)");

  script_set_attribute(attribute:"synopsis", value:
"An IDE application installed on the remote macOS or Mac OS X host is affected by multiple remote code execution
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Apple Xcode installed on the remote macOS or Mac OS X host is prior to 9.0. It is, therefore, affected
by multiple remote code execution vulnerabilities in the git, Id64, and subversion components. An unauthenticated,
remote attacker can exploit these vulnerabilities to cause execution of arbitrary code.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208103");
  # https://lists.apple.com/archives/security-announce/2017/Sep/msg00001.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f9703a45");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple Xcode version 9.0 or later.");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-9800");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Malicious Git HTTP Server For CVE-2017-1000117');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:xcode");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_xcode_installed.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "installed_sw/Apple Xcode");

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit('Host/local_checks_enabled');

os = get_kb_item('Host/MacOSX/Version');
if (empty_or_null(os))
  audit(AUDIT_OS_NOT, 'macOS or Mac OS X');

app_info = vcf::get_app_info(app:'Apple Xcode');

vcf::check_granularity(app_info:app_info, sig_segments:2);

constraints = [
  { 'fixed_version' : '9.0' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);

References