Vulnerabilities > CVE-2016-4731 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Safari

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
apple
CWE-119
nessus
NVD
Published: 2016-09-25
Updated: 2024-11-21

Summary

WebKit in Apple iOS before 10 and Safari before 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, a different vulnerability than CVE-2016-4729.

Vulnerable Configurations

Part Description Count
Application
Apple
147
OS
Apple
147

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_SAFARI10_0.NASL
descriptionThe version of Apple Safari installed on the remote Mac OS X or macOS host is prior to 10.0. It is, therefore, affected by multiple vulnerabilities : - Multiple memory corruption issues exist in WebKit that allow an unauthenticated, remote attacker to cause a denial of service condition or execute arbitrary code via specially a crafted website. (CVE-2016-4611, CVE-2016-4729, CVE-2016-4730, CVE-2016-4731, CVE-2016-4734, CVE-2016-4735, CVE-2016-4737, CVE-2016-4759, CVE-2016-4762, CVE-2016-4766, CVE-2016-4767, CVE-2016-4768, CVE-2016-4769) - A cross-site scripting (XSS) vulnerability exists in the Reader feature due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to follow a specially crafted link, to execute arbitrary script code in a user
last seen2020-06-01
modified2020-06-02
plugin id93721
published2016-09-26
reporterThis script is Copyright (C) 2016-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/93721
titleMac OS X : Apple Safari < 10.0 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(93721);
  script_version("1.6");
  script_cvs_date("Date: 2018/07/14  1:59:36");

  script_cve_id(
    "CVE-2016-4611",
    "CVE-2016-4618",
    "CVE-2016-4728",
    "CVE-2016-4729",
    "CVE-2016-4730",
    "CVE-2016-4731",
    "CVE-2016-4733",
    "CVE-2016-4734",
    "CVE-2016-4735",
    "CVE-2016-4737",
    "CVE-2016-4751",
    "CVE-2016-4758",
    "CVE-2016-4759",
    "CVE-2016-4760",
    "CVE-2016-4762",
    "CVE-2016-4763",
    "CVE-2016-4765",
    "CVE-2016-4766",
    "CVE-2016-4767",
    "CVE-2016-4768",
    "CVE-2016-4769"
  );
  script_bugtraq_id(
    93053,
    93057,
    93058,
    93062,
    93064,
    93065,
    93066,
    93067
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-09-20-2");

  script_name(english:"Mac OS X : Apple Safari < 10.0 Multiple Vulnerabilities");
  script_summary(english:"Checks the Safari version.");

  script_set_attribute(attribute:"synopsis", value:
"A web browser installed on the remote host is affected by multiple
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Apple Safari installed on the remote Mac OS X or macOS
host is prior to 10.0. It is, therefore, affected by multiple
vulnerabilities :

  - Multiple memory corruption issues exist in WebKit that
    allow an unauthenticated, remote attacker to cause a
    denial of service condition or execute arbitrary code
    via specially a crafted website. (CVE-2016-4611,
    CVE-2016-4729, CVE-2016-4730, CVE-2016-4731,
    CVE-2016-4734, CVE-2016-4735, CVE-2016-4737,
    CVE-2016-4759, CVE-2016-4762, CVE-2016-4766,
    CVE-2016-4767, CVE-2016-4768, CVE-2016-4769)

  - A cross-site scripting (XSS) vulnerability exists in the
    Reader feature due to improper validation of
    user-supplied input before returning it to users. An
    unauthenticated, remote attacker can exploit this, by
    convincing a user to follow a specially crafted link, to
    execute arbitrary script code in a user's browser
    session. (CVE-2016-4618)

  - A flaw exists in WebKit due to improper handling of
    error prototypes. An unauthenticated, remote attacker
    can exploit this, via a specially crafted website, to
    execute arbitrary code. (CVE-2016-4728)

  - Multiple flaws exist in WebKit due to improper state
    management. An unauthenticated, remote attacker
    can exploit this, via a specially crafted website, to
    cause a denial of service condition or the execution of
    arbitrary code. (CVE-2016-4733, CVE-2016-4765)

  - An address bar spoofing vulnerability exists due to a
    state management flaw related to sessions in tabs. An
    unauthenticated, remote attacker can exploit this, via a
    specially crafted website, to spoof an address in the
    address bar. (CVE-2016-4751)

  - A flaw exists in WebKit due to improper handling of the
    location variable. An unauthenticated, remote attacker
    can exploit this, via a crafted website, to disclose
    sensitive information. (CVE-2016-4758)

  - A flaw exists in WebKit that allows an unauthenticated,
    remote attacker to conduct DNS rebinding attacks against
    non-HTTP Safari sessions by leveraging HTTP/0.9 support.
    (CVE-2016-4760)

  - A flaw exists in WebKit in the WKWebView component due
    to improper validation of X.509 certificates from HTTPS
    servers. A man-in-the-middle attacker can exploit this,
    via a crafted certificate, to disclose sensitive
    information. (CVE-2016-4763)");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207157");
  # http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1c557615");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple Safari version 10.0 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: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:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/09/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/09/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/26");

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

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

  script_copyright(english:"This script is Copyright (C) 2016-2018 Tenable Network Security, Inc.");

  script_dependencies("macosx_Safari31.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "MacOSX/Safari/Installed");

  exit(0);
}

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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
os = get_kb_item("Host/MacOSX/Version");
if (!os) audit(AUDIT_OS_NOT, "Mac OS X / macOS");

if (!ereg(pattern:"Mac OS X 10\.1([0-2])([^0-9]|$)", string:os))
  audit(AUDIT_OS_NOT, "Mac OS X 10.10 / 10.11 or macOS 10.12");

installed = get_kb_item_or_exit("MacOSX/Safari/Installed", exit_code:0);
path    = get_kb_item_or_exit("MacOSX/Safari/Path", exit_code:1);
version = get_kb_item_or_exit("MacOSX/Safari/Version", exit_code:1);

fixed_version = "10.0";

if (ver_compare(ver:version, fix:fixed_version, strict:FALSE) == -1)
{
  report = report_items_str(
    report_items:make_array(
      "Path", path,
      "Installed version", version,
      "Fixed version", fixed_version
    ),
    ordered_fields:make_list("Path", "Installed version", "Fixed version")
  );
  security_report_v4(port:0, severity:SECURITY_HOLE, xss:TRUE, extra:report);
}
else audit(AUDIT_INST_PATH_NOT_VULN, "Safari", version, path);

References