Vulnerabilities > CVE-2015-3796 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Iphone OS and mac OS X

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
apple
CWE-119
nessus
exploit available

Summary

The TRE library in Libc in Apple iOS before 8.4.1 and OS X before 10.10.5 allows context-dependent attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted regular expression, a different vulnerability than CVE-2015-3797 and CVE-2015-3798.

Vulnerable Configurations

Part Description Count
OS
Apple
220

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.

Exploit-Db

descriptionOS X Regex Engine (TRE) - Stack Buffer Overflow. CVE-2015-3796. Dos exploit for osx platform
fileexploits/osx/dos/38263.txt
idEDB-ID:38263
last seen2016-02-04
modified2015-09-22
platformosx
port
published2015-09-22
reporterGoogle Security Research
sourcehttps://www.exploit-db.com/download/38263/
titleOS X Regex Engine TRE - Stack Buffer Overflow
typedos

Nessus

  • NASL familyMisc.
    NASL idAPPLETV_7_2_1.NASL
    descriptionAccording to its banner, the remote Apple TV device is a version prior to 7.2.1. It is, therefore, affected by multiple vulnerabilities in the following components : - bootp - CFPreferences - CloudKit - Code Signing - CoreMedia Playback - CoreText - DiskImages - FontParser - ImageIO - IOHIDFamily - IOKit - Kernel - Libc - Libinfo - libpthread - libxml2 - libxpc - libxslt - Location Framework - Office Viewer - QL Office - Sandbox_profiles - WebKit
    last seen2020-06-01
    modified2020-06-02
    plugin id90315
    published2016-04-04
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/90315
    titleApple TV < 7.2.1 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(90315);
      script_version("1.12");
      script_cvs_date("Date: 2019/11/19");
    
      script_cve_id(
        "CVE-2012-6685",
        "CVE-2014-0191",
        "CVE-2014-3660",
        "CVE-2015-3730",
        "CVE-2015-3731",
        "CVE-2015-3732",
        "CVE-2015-3733",
        "CVE-2015-3734",
        "CVE-2015-3735",
        "CVE-2015-3736",
        "CVE-2015-3737",
        "CVE-2015-3738",
        "CVE-2015-3739",
        "CVE-2015-3740",
        "CVE-2015-3741",
        "CVE-2015-3742",
        "CVE-2015-3743",
        "CVE-2015-3744",
        "CVE-2015-3745",
        "CVE-2015-3746",
        "CVE-2015-3747",
        "CVE-2015-3748",
        "CVE-2015-3749",
        "CVE-2015-3750",
        "CVE-2015-3751",
        "CVE-2015-3752",
        "CVE-2015-3753",
        "CVE-2015-3759",
        "CVE-2015-3766",
        "CVE-2015-3768",
        "CVE-2015-3776",
        "CVE-2015-3778",
        "CVE-2015-3782",
        "CVE-2015-3784",
        "CVE-2015-3793",
        "CVE-2015-3795",
        "CVE-2015-3796",
        "CVE-2015-3797",
        "CVE-2015-3798",
        "CVE-2015-3800",
        "CVE-2015-3802",
        "CVE-2015-3803",
        "CVE-2015-3804",
        "CVE-2015-3805",
        "CVE-2015-3806",
        "CVE-2015-3807",
        "CVE-2015-5749",
        "CVE-2015-5755",
        "CVE-2015-5756",
        "CVE-2015-5757",
        "CVE-2015-5758",
        "CVE-2015-5761",
        "CVE-2015-5773",
        "CVE-2015-5774",
        "CVE-2015-5775",
        "CVE-2015-5776",
        "CVE-2015-5777",
        "CVE-2015-5778",
        "CVE-2015-5781",
        "CVE-2015-5782",
        "CVE-2015-7995"
      );
      script_bugtraq_id(
        67233,
        70644,
        76337,
        76338,
        76341,
        76343,
        77325
      );
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-02-25-1");
    
      script_name(english:"Apple TV < 7.2.1 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 7.2.1. It is, therefore, affected by multiple vulnerabilities in
    the following components :
    
      - bootp
      - CFPreferences
      - CloudKit
      - Code Signing
      - CoreMedia Playback
      - CoreText
      - DiskImages
      - FontParser
      - ImageIO
      - IOHIDFamily
      - IOKit
      - Kernel
      - Libc
      - Libinfo
      - libpthread
      - libxml2
      - libxpc
      - libxslt
      - Location Framework
      - Office Viewer
      - QL Office
      - Sandbox_profiles
      - WebKit");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT205795");
      # https://lists.apple.com/archives/security-announce/2016/Feb/msg00000.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d959a1e0");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple TV version 7.2.1 or later. Note that this update is
    only available for 3rd generation models.");
      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: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-2015-5757");
    
      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:"2016/02/25");
      script_set_attribute(attribute:"patch_publication_date", value:"2016/02/25");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/04");
    
      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) 2016-2019 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 = "12H523";
    tvos_ver = '7.2.1';
    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
    );
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2016-0FF6C3D84B.NASL
    descriptionThis update includes the following fixes : - fix for CVE-2016-8859 - fix for CVE-2015-3796 (see https://github.com/laurikari/tre/issues/37 and https://bugs.chromium.org/p/project-zero/issues/detail?i d=428) - fix for parallel installation of multilib packages Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2016-11-15
    plugin id94777
    published2016-11-15
    reporterThis script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/94777
    titleFedora 23 : tre (2016-0ff6c3d84b)
  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_10_10_5.NASL
    descriptionThe remote host is running a version of Mac OS X 10.10.x that is prior to 10.10.5. It is, therefore, affected by multiple vulnerabilities in the following components : - apache - apache_mod_php - Apple ID OD Plug-in - AppleGraphicsControl - Bluetooth - bootp - CloudKit - CoreMedia Playback - CoreText - curl - Data Detectors Engine - Date & Time pref pane - Dictionary Application - DiskImages - dyld - FontParser - groff - ImageIO - Install Framework Legacy - IOFireWireFamily - IOGraphics - IOHIDFamily - Kernel - Libc - Libinfo - libpthread - libxml2 - libxpc - mail_cmds - Notification Center OSX - ntfs - OpenSSH - OpenSSL - perl - PostgreSQL - python - QL Office - Quartz Composer Framework - Quick Look - QuickTime 7 - SceneKit - Security - SMBClient - Speech UI - sudo - tcpdump - Text Formats - udf Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id85408
    published2015-08-17
    reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/85408
    titleMac OS X 10.10.x < 10.10.5 Multiple Vulnerabilities
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2016-CD09EAB674.NASL
    descriptionThis update includes the following fixes : - fix for CVE-2016-8859 - fix for CVE-2015-3796 (see https://github.com/laurikari/tre/issues/37 and https://bugs.chromium.org/p/project-zero/issues/detail?i d=428) - fix for parallel installation of multilib packages Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2016-11-15
    plugin id94863
    published2016-11-15
    reporterThis script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/94863
    titleFedora 24 : tre (2016-cd09eab674)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2016-0A952A3BC0.NASL
    descriptionThis update includes the following fixes : - fix for CVE-2016-8859 - fix for CVE-2015-3796 (see https://github.com/laurikari/tre/issues/37 and https://bugs.chromium.org/p/project-zero/issues/detail?i d=428) - fix for parallel installation of multilib packages Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2016-11-21
    plugin id94990
    published2016-11-21
    reporterThis script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/94990
    titleFedora 25 : tre (2016-0a952a3bc0)