Vulnerabilities > CVE-2015-1086 - Improper Input Validation vulnerability in Apple Iphone OS and Tvos

047910
CVSS 6.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
local
apple
CWE-20
nessus

Summary

The Audio Drivers subsystem in Apple iOS before 8.3 and Apple TV before 7.2 does not properly validate IOKit object metadata, which allows attackers to execute arbitrary code in a privileged context via a crafted app.

Vulnerable Configurations

Part Description Count
OS
Apple
169

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.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

NASL familyMisc.
NASL idAPPLETV_7_2.NASL
descriptionAccording to its banner, the remote Apple TV device is a version prior to 7.2. It is, therefore, affected by the following vulnerabilities : - Multiple memory corruption vulnerabilities exist in WebKit due to improperly validated user-supplied input. A remote attacker, using a specially crafted website, can exploit these to execute arbitrary code. (CVE-2015-1068, CVE-2015-1069, CVE-2015-1070, CVE-2015-1071, CVE-2015-1072, CVE-2015-1073, CVE-2015-1074, CVE-2015-1076, CVE-2015-1077, CVE-2015-1078, CVE-2015-1079, CVE-2015-1080, CVE-2015-1081, CVE-2015-1082, CVE-2015-1083, CVE-2015-1119, CVE-2015-1120, CVE-2015-1121, CVE-2015-1122, CVE-2015-1123, CVE-2015-1124) - An error exists in the IOKit objects due to improper validation of metadata used by an audio driver, which allows arbitrary code execution. (CVE-2015-1086) - An XML External Entity (XXE) injection vulnerability exists in the NSXMLParser due to improper handling of XML files, which allows information disclosure. (CVE-2015-1092) - An error exists in the IOAcceleratorFamily that allows the kernel memory layout to be disclosed. (CVE-2015-1094) - A memory corruption vulnerability exists in the IOHIDFamily API that allows arbitrary code execution. (CVE-2015-1095) - An error exists in the IOHIDFamily due to improper bounds checking, which allows the kernel memory layout to be disclosed. (CVE-2015-1096) - An error exists in the MobileFrameBuffer due to improper bounds checking, which allows the kernel memory layout to be disclosed. (CVE-2015-1097) - A denial of service vulnerability exists in the setreuid() system call due to a race condition. (CVE-2015-1099) - An out-of-bounds memory error exists in the kernel that allows a denial of service attack or information disclosure. (CVE-2015-1100) - A memory corruption vulnerability exists in the kernel that allows arbitrary code execution. (CVE-2015-1101) - A denial of service vulnerability exists due to a state inconsistency in the processing of TCP headers, which can only be exploited from an adjacent network. (CVE-2015-1102) - A vulnerability exists that allows a man-in-the-middle attacker to redirect traffic via ICMP redirects. (CVE-2015-1103) - A security bypass vulnerability exists due to the system treating remote IPv6 packets as local packets, which allows an attacker to bypass network filters. (CVE-2015-1104) - A denial of service vulnerability exists due to improper processing of TCP out-of-band data, which allows a denial of service by a remote attacker. (CVE-2015-1105) - An information disclosure vulnerability exists due to unique identifiers being sent to remote servers when downloading assets for a podcast. (CVE-2015-1110) - An information disclosure vulnerability exists in the third-party application sandbox that allows hardware identifiers to be accessible by other applications. (CVE-2015-1114) - A privilege escalation vulnerability exists in the setreuid() and setregid() system calls due to a failure to drop privileges permanently. (CVE-2015-1117) - A memory corruption vulnerability exists due to improper bounds checking when processing configuration profiles, which allows a denial of service attack. (CVE-2015-1118)
last seen2020-06-01
modified2020-06-02
plugin id82712
published2015-04-10
reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/82712
titleApple TV < 7.2 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(82712);
  script_version("1.12");
  script_cvs_date("Date: 2019/11/22");

  script_cve_id(
    "CVE-2015-1068",
    "CVE-2015-1069",
    "CVE-2015-1070",
    "CVE-2015-1071",
    "CVE-2015-1072",
    "CVE-2015-1073",
    "CVE-2015-1074",
    "CVE-2015-1076",
    "CVE-2015-1077",
    "CVE-2015-1078",
    "CVE-2015-1079",
    "CVE-2015-1080",
    "CVE-2015-1081",
    "CVE-2015-1082",
    "CVE-2015-1083",
    "CVE-2015-1086",
    "CVE-2015-1092",
    "CVE-2015-1094",
    "CVE-2015-1095",
    "CVE-2015-1096",
    "CVE-2015-1097",
    "CVE-2015-1099",
    "CVE-2015-1100",
    "CVE-2015-1101",
    "CVE-2015-1102",
    "CVE-2015-1103",
    "CVE-2015-1104",
    "CVE-2015-1105",
    "CVE-2015-1110",
    "CVE-2015-1114",
    "CVE-2015-1117",
    "CVE-2015-1118",
    "CVE-2015-1119",
    "CVE-2015-1120",
    "CVE-2015-1121",
    "CVE-2015-1122",
    "CVE-2015-1123",
    "CVE-2015-1124"
  );
  script_bugtraq_id(
    73176,
    73972,
    73981,
    73983,
    73985,
    73986
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2015-04-08-4");

  script_name(english:"Apple TV < 7.2 Multiple Vulnerabilities");
  script_summary(english:"Checks the version in the banner.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the remote Apple TV device is a version prior
to 7.2. It is, therefore, affected by the following vulnerabilities :

  - Multiple memory corruption vulnerabilities exist in
    WebKit due to improperly validated user-supplied input.
    A remote attacker, using a specially crafted website,
    can exploit these to execute arbitrary code.
    (CVE-2015-1068, CVE-2015-1069, CVE-2015-1070,
    CVE-2015-1071, CVE-2015-1072, CVE-2015-1073,
    CVE-2015-1074, CVE-2015-1076, CVE-2015-1077,
    CVE-2015-1078, CVE-2015-1079, CVE-2015-1080,
    CVE-2015-1081, CVE-2015-1082, CVE-2015-1083,
    CVE-2015-1119, CVE-2015-1120, CVE-2015-1121,
    CVE-2015-1122, CVE-2015-1123, CVE-2015-1124)

  - An error exists in the IOKit objects due to improper
    validation of metadata used by an audio driver, which
    allows arbitrary code execution. (CVE-2015-1086)

  - An XML External Entity (XXE) injection vulnerability
    exists in the NSXMLParser due to improper handling of
    XML files, which allows information disclosure.
    (CVE-2015-1092)

  - An error exists in the IOAcceleratorFamily that allows
    the kernel memory layout to be disclosed.
    (CVE-2015-1094)

  - A memory corruption vulnerability exists in the
    IOHIDFamily API that allows arbitrary code execution.
    (CVE-2015-1095)

  - An error exists in the IOHIDFamily due to improper
    bounds checking, which allows the kernel memory layout
    to be disclosed. (CVE-2015-1096)

  - An error exists in the MobileFrameBuffer due to improper
    bounds checking, which allows the kernel memory layout
    to be disclosed. (CVE-2015-1097)

  - A denial of service vulnerability exists in the
    setreuid() system call due to a race condition.
    (CVE-2015-1099)

  - An out-of-bounds memory error exists in the kernel that
    allows a denial of service attack or information
    disclosure. (CVE-2015-1100)

  - A memory corruption vulnerability exists in the kernel
    that allows arbitrary code execution. (CVE-2015-1101)

  - A denial of service vulnerability exists due to a state
    inconsistency in the processing of TCP headers, which
    can only be exploited from an adjacent network.
    (CVE-2015-1102)

  - A vulnerability exists that allows a man-in-the-middle
    attacker to redirect traffic via ICMP redirects.
    (CVE-2015-1103)

  - A security bypass vulnerability exists due to the
    system treating remote IPv6 packets as local packets,
    which allows an attacker to bypass network filters.
    (CVE-2015-1104)

  - A denial of service vulnerability exists due to improper
    processing of TCP out-of-band data, which allows a
    denial of service by a remote attacker. (CVE-2015-1105)

  - An information disclosure vulnerability exists due to
    unique identifiers being sent to remote servers when
    downloading assets for a podcast. (CVE-2015-1110)

  - An information disclosure vulnerability exists in the
    third-party application sandbox that allows hardware
    identifiers to be accessible by other applications.
    (CVE-2015-1114)

  - A privilege escalation vulnerability exists in the
    setreuid() and setregid() system calls due to a failure
    to drop privileges permanently. (CVE-2015-1117)

  - A memory corruption vulnerability exists due to improper
    bounds checking when processing configuration profiles,
    which allows a denial of service attack. (CVE-2015-1118)");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT204662");
  # https://lists.apple.com/archives/security-announce/2015/Apr/msg00003.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?028da58b");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple TV 7.2 or later. Note that this update is only
available for 3rd generation and later models.");
  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-2015-1103");

  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:"2015/03/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/04/10");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:apple_tv");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("appletv_version.nasl");
  script_require_keys("AppleTV/Version", "AppleTV/URL", "AppleTV/Port");
  script_require_ports("Services/www", 7000);

  exit(0);
}

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

url = get_kb_item('AppleTV/URL');
if (empty_or_null(url)) exit(0, 'Cannot determine Apple TV URL.');
port = get_kb_item('AppleTV/Port');
if (empty_or_null(port)) exit(0, 'Cannot determine Apple TV port.');

build = get_kb_item('AppleTV/Version');
if (empty_or_null(build)) audit(AUDIT_UNKNOWN_DEVICE_VER, 'Apple TV');

model = get_kb_item('AppleTV/Model');
if (empty_or_null(model)) exit(0, 'Cannot determine Apple TV model.');

fixed_build = "12F69";
tvos_ver = '7.2';
gen = APPLETV_MODEL_GEN[model];

appletv_check_version(
  build          : build,
  fix            : fixed_build,
  affected_gen   : 3,
  model          : model,
  gen            : gen,
  fix_tvos_ver   : tvos_ver,
  port           : port,
  url            : url,
  severity       : SECURITY_HOLE
);