Vulnerabilities > CVE-2017-2524 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple products

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

An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. macOS before 10.12.5 is affected. tvOS before 10.2.1 is affected. watchOS before 3.2.2 is affected. The issue involves the "TextInput" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via crafted data.

Vulnerable Configurations

Part Description Count
OS
Apple
326

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

descriptionApple iOS/macOS - NSKeyedArchiver Heap Corruption Due to Rounding Error in 'TIKeyboardLayout initWithCoder:'. CVE-2017-2524. Dos exploit for Multiple platform
fileexploits/multiple/dos/42051.txt
idEDB-ID:42051
last seen2017-05-25
modified2017-05-23
platformmultiple
port
published2017-05-23
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/42051/
titleApple iOS/macOS - NSKeyedArchiver Heap Corruption Due to Rounding Error in 'TIKeyboardLayout initWithCoder:'
typedos

Nessus

  • NASL familyMisc.
    NASL idAPPLETV_10_2_1.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 10.2.1. It is, therefore, affected by multiple vulnerabilities : - A memory corruption issue exists in the WebKit Web Inspector component that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2017-2499) - An unspecified race condition exists in the Kernel component that allows a local attacker to execute arbitrary code with kernel-level privileges. (CVE-2017-2501) - An information disclosure vulnerability exists in the CoreAudio component due to improper sanitization of certain input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-2502) - A universal cross-site scripting (XSS) vulnerability exists in WebKit due to a logic flaw when handling WebKit Editor commands. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to execute arbitrary script code in a user
    last seen2020-06-01
    modified2020-06-02
    plugin id100256
    published2017-05-17
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100256
    titleApple TV < 10.2.1 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(100256);
      script_version("1.9");
      script_cvs_date("Date: 2019/11/13");
    
      script_cve_id(
        "CVE-2017-2499",
        "CVE-2017-2501",
        "CVE-2017-2502",
        "CVE-2017-2504",
        "CVE-2017-2505",
        "CVE-2017-2507",
        "CVE-2017-2513",
        "CVE-2017-2515",
        "CVE-2017-2518",
        "CVE-2017-2519",
        "CVE-2017-2520",
        "CVE-2017-2521",
        "CVE-2017-2524",
        "CVE-2017-2525",
        "CVE-2017-2530",
        "CVE-2017-2531",
        "CVE-2017-2536",
        "CVE-2017-2549",
        "CVE-2017-6979",
        "CVE-2017-6980",
        "CVE-2017-6984",
        "CVE-2017-6987",
        "CVE-2017-6989",
        "CVE-2017-7003",
        "CVE-2017-7005"
      );
      script_bugtraq_id(
        98454,
        98455,
        98456,
        98457,
        98468,
        98473
      );
    
      script_name(english:"Apple TV < 10.2.1 Multiple Vulnerabilities");
      script_summary(english:"Checks the build number.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote Apple TV device is affected by multiple vulnerabilities.");
      script_set_attribute(attribute:"description", value:
    "According to its banner, the version of Apple TV on the remote device
    is prior to 10.2.1. It is, therefore, affected by multiple
    vulnerabilities :
    
      - A memory corruption issue exists in the WebKit Web
        Inspector component that allows an unauthenticated,
        remote attacker to execute arbitrary code.
        (CVE-2017-2499)
    
      - An unspecified race condition exists in the Kernel
        component that allows a local attacker to execute
        arbitrary code with kernel-level privileges.
        (CVE-2017-2501)
    
      - An information disclosure vulnerability exists in the
        CoreAudio component due to improper sanitization of
        certain input. A local attacker can exploit this to read
        the contents of restricted memory. (CVE-2017-2502)
    
      - A universal cross-site scripting (XSS) vulnerability
        exists in WebKit due to a logic flaw when handling
        WebKit Editor commands. An unauthenticated, remote
        attacker can exploit this, via a specially crafted web
        page, to execute arbitrary script code in a user's
        browser session. (CVE-2017-2504)
    
      - Multiple memory corruption issues exist in WebKit due to
        improper validation of certain input. An
        unauthenticated, remote attacker can exploit these to
        execute arbitrary code. (CVE-2017-2505, CVE-2017-2515,
        CVE-2017-2521, CVE-2017-2530, CVE-2017-2531,
        CVE-2017-6980, CVE-2017-6984)
    
      - Multiple information disclosure vulnerabilities exist
        in the Kernel component due to improper sanitization of
        certain input. A local attacker can exploit these to
        read the contents of restricted memory. (CVE-2017-2507,
        CVE-2017-6987)
    
      - A use-after-free error exists in the SQLite component
        when handling SQL queries. An unauthenticated, remote
        attacker can exploit this to deference already freed
        memory, resulting in the execution of arbitrary code.
        (CVE-2017-2513)
    
      - Multiple buffer overflow conditions exist in the SQLite
        component due to the improper validation of certain
        input. An unauthenticated, remote attacker can exploit
        these, via a specially crafted SQL query, to execute
        arbitrary code. (CVE-2017-2518, CVE-2017-2520)
    
      - A memory corruption issue exists in the SQLite component
        when handling SQL queries. An unauthenticated, remote
        attacker can exploit this, via a specially crafted
        query, to execute arbitrary code. (CVE-2017-2519)
    
      - An unspecified memory corruption issue exists in the
        TextInput component when parsing specially crafted data.
        An unauthenticated, remote attacker can exploit this to
        execute arbitrary code. (CVE-2017-2524)
    
      - A use-after-free error exists in WebKit when handling
        RenderLayer objects. An unauthenticated, remote attacker
        can exploit this, via a specially crafted web page, to
        deference already freed memory, resulting in the
        execution of arbitrary code. (CVE-2017-2525)
    
      - Multiple unspecified flaws exist in WebKit that allow
        an unauthenticated, remote attacker to corrupt memory
        and execute arbitrary code by using specially crafted
        web content. (CVE-2017-2536)
    
      - A universal cross-site scripting (XSS) vulnerability
        exists in WebKit due to a logic error when handling
        frame loading. An unauthenticated, remote attacker can
        exploit this, via a specially crafted web page, to
        execute arbitrary code in a user's browser session.
        (CVE-2017-2549)
    
      - An unspecified flaw exists in the IOSurface component
        that allows a local attacker to corrupt memory and
        execute arbitrary code with kernel-level privileges.
        (CVE-2017-6979)
    
      - An unspecified flaw exists in the AVEVideoEncoder
        component that allows a local attacker, via a specially
        crafted application, to corrupt memory and execute
        arbitrary code with kernel-level privileges.
        (CVE-2017-6989)
    
      - A denial of service vulnerability exists in the
        CoreText component due to improper validation of
        user-supplied input. An unauthenticated, remote attacker
        can exploit this, via a specially crafted file, to crash
        an application. (CVE-2017-7003)
    
      - A memory corruption issue exists in the JavaScriptCore
        component due to improper validation of user-supplied
        input. An unauthenticated, remote attacker can exploit
        this, via specially crafted web content, to cause a
        denial of service condition or the execution of
        arbitrary code. (CVE-2017-7005)
    
    Note that only 4th generation models are affected by these
    vulnerabilities.");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207801");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple TV version 10.2.1 or later. Note that this update is
    only available for 4th 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: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-2017-6989");
    
      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:"2017/05/15");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/05/15");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/17");
    
      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) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("appletv_version.nasl");
      script_require_keys("AppleTV/Version", "AppleTV/Model", "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 = "14W585a";
    tvos_ver = '10.2.1';
    
    # determine gen from the model
    gen = APPLETV_MODEL_GEN[model];
    
    appletv_check_version(
      build          : build,
      fix            : fixed_build,
      affected_gen   : 4,
      fix_tvos_ver   : tvos_ver,
      model          : model,
      gen            : gen,
      port           : port,
      url            : url,
      severity       : SECURITY_HOLE,
      xss            : TRUE
    );
    
  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD_10_11_6_2017-002__10_10_5_2017-002.NASL
    descriptionThe remote host is running a version of Mac OS X 10.10.5 or 10.11.6 that is missing a security update. It is therefore, affected by multiple vulnerabilities : - A memory corruption issue exists in the Sandbox component that allows an unauthenticated, remote attacker to escape an application sandbox. (CVE-2017-2512) - An information disclosure vulnerability exists in the Kernel component due to improper sanitization of user-supplied input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-2516) - An unspecified memory corruption issue exists in the TextInput component when parsing specially crafted data. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-2524) - A flaw exists in the CoreAnimation component when handling specially crafted data. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-2527) - A race condition exists in the DiskArbitration feature that allow a local attacker to gain system-level privileges. (CVE-2017-2533) - A resource exhaustion issue exists in the Security component due to improper validation of user-supplied input. A local attacker can exploit this to exhaust resources and escape an application sandbox. (CVE-2017-2535) - Multiple memory corruption issues exist in the WindowServer component that allow a local attacker to execute arbitrary code with system-level privileges. (CVE-2017-2537, CVE-2017-2548) - An information disclosure vulnerability exists in WindowServer component in the _XGetConnectionPSN() function due to improper validation of user-supplied input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-2540) - A stack-based buffer overflow condition exists in the WindowServer component in the _XGetWindowMovementGroup() function due to improper validation of user-supplied input. A local attacker can exploit this to execute arbitrary code with the privileges of WindowServer. (CVE-2017-2541) - A memory corruption issue exists in the Kernel component that allow a local attacker to gain kernel-level privileges. (CVE-2017-2546) - A race condition exists in the IOSurface component that allows a local attacker to execute arbitrary code with kernel-level privileges. (CVE-2017-6979) - An information disclosure vulnerability exists in HFS component due to improper sanitization of user-supplied input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-6990)
    last seen2020-06-01
    modified2020-06-02
    plugin id100271
    published2017-05-18
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100271
    titleMac OS X Multiple Vulnerabilities (Security Update 2017-002)
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_12_5.NASL
    descriptionThe remote host is running a version of macOS that is 10.12.x prior to 10.12.5. It is, therefore, affected by multiple vulnerabilities : - Multiple memory corruption issues exist in the Kernel component that allow a local attacker to gain kernel-level privileges. (CVE-2017-2494, CVE-2017-2546) - A state management flaw exists in the iBooks component due to improper handling of URLs. An unauthenticated, remote attacker can exploit this, via a specially crafted book, to open arbitrary websites without user permission. (CVE-2017-2497) - A local privilege escalation vulnerability exists in the Kernel component due to a race condition. A local attacker can exploit this to execute arbitrary code with kernel-level privileges. (CVE-2017-2501) - An information disclosure vulnerability exists in the CoreAudio component due to improper sanitization of user-supplied input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-2502) - A memory corruption issue exists in the Intel graphics driver component that allows a local attacker to execute arbitrary code with kernel-level privileges. CVE-2017-2503) - Multiple information disclosure vulnerabilities exist in the Kernel component due to improper sanitization of user-supplied input. A local attacker can exploit these to read the contents of restricted memory. (CVE-2017-2507, CVE-2017-2509, CVE-2017-2516, CVE-2017-6987) - A memory corruption issue exists in the Sandbox component that allows an unauthenticated, remote attacker to escape an application sandbox. (CVE-2017-2512) - A use-after-free error exists in the SQLite component when handling SQL queries. An unauthenticated, remote attacker can exploit this to deference already freed memory, resulting in the execution of arbitrary code. (CVE-2017-2513) - Multiple buffer overflow conditions exist in the SQLite component due to the improper validation of user-supplied input. An unauthenticated, remote attacker can exploit these, via a specially crafted SQL query, to execute arbitrary code. (CVE-2017-2518, CVE-2017-2520) - A memory corruption issue exists in the SQLite component when handling SQL queries. An unauthenticated, remote attacker can exploit this, via a specially crafted SQL query, to execute arbitrary code. (CVE-2017-2519) - An unspecified memory corruption issue exists in the TextInput component when parsing specially crafted data. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-2524) - A flaw exists in the CoreAnimation component when handling specially crafted data. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-2527) - A race condition exists in the DiskArbitration feature that allow a local attacker to gain system-level privileges. (CVE-2017-2533) - An unspecified flaw exists in the Speech Framework that allows a local attacker to escape an application sandbox. (CVE-2017-2534) - A resource exhaustion issue exists in the Security component due to improper validation of user-supplied input. A local attacker can exploit this to exhaust resources and escape an application sandbox. (CVE-2017-2535) - Multiple memory corruption issues exist in the WindowServer component that allow a local attacker to execute arbitrary code with system-level privileges. (CVE-2017-2537, CVE-2017-2548) - An information disclosure vulnerability exists in WindowServer component in the _XGetConnectionPSN() function due to improper validation of user-supplied input. A local attacker can exploit this to read the contents of restricted memory. (CVE-2017-2540) - A stack-based buffer overflow condition exists in the WindowServer component in the _XGetWindowMovementGroup() function due to improper validation of user-supplied input. A local attacker can exploit this to execute arbitrary code with the privileges of WindowServer. (CVE-2017-2541) - Multiple memory corruption issues exist in the Multi-Touch component that allow a local attacker to execute arbitrary code with kernel-level privileges. (CVE-2017-2542, CVE-2017-2543) - A use-after-free error exists in the IOGraphic component that allows a local attacker to execute arbitrary code with kernel-level privileges. (CVE-2017-2545) - A flaw exists in the Speech Framework, specifically within the speechsynthesisd service, due to improper validation of unsigned dynamic libraries (.dylib) before being loaded. A local attacker can exploit this to bypass the application
    last seen2020-06-01
    modified2020-06-02
    plugin id100270
    published2017-05-18
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100270
    titlemacOS 10.12.x < 10.12.5 Multiple Vulnerabilities

Seebug

bulletinFamilyexploit
descriptionUsing lldb inside a simple hello_world app for iOS we can see that there are over 600 classes which we could get deserialized (for persistance for example.) The TextInput framework which is loaded has a class TIKeyboardLayout. The initWithCoder: implementation has this code: ``` (this is the x86 code, the framework is there on both platforms.) mov r15, cs:selRef_decodeBytesForKey_returnedLength_ lea rdx, cfstr_Frames ; "frames" lea rcx, [rbp+var_40] <-- length of serialized binary data mov rdi, r14 mov rsi, r15 call r13 ; _objc_msgSend mov r12, rax <-- pointer to serialized binary data mov rdx, [rbp+var_40] shr rdx, 3 <-- divide length by 8 mov rax, cs:_OBJC_IVAR_$_TIKeyboardLayout__count ; uint64_t _count; mov [rbx+rax], rdx mov rsi, cs:selRef_ensureFrameCapacity_ mov rdi, rbx call r13 ; _objc_msgSend <-- will calloc(len/8, 8) and assign to _frames mov rax, cs:_OBJC_IVAR_$_TIKeyboardLayout__frames ; struct _ShortRect *_frames; mov rdi, [rbx+rax] ; void * mov rdx, [rbp+var_40] ; size_t <-- original length not divided by 8 mov rsi, r12 ; void * call _memcpy <-- can memcpy up to 7 bytes more than was allocated ``` This method reads binary data from the NSCoder, it divides the length by 8 and passes that to ensureFrameCapacity which passes it to calloc with an item size of 8. This has the effect of mallocing the original size rounded down to the nearest multiple of 8. The memcpy then uses the original length (not rounded down) causing a controlled heap buffer overflow. I've created a serialized TIKeyboardLayout with a frames value which is "A"*0x107. Use ASAN to see the crash clearly (see provided compiler invokation.) tested on MacOS 10.12.3 (16D32) [tik.zip](https://bugs.chromium.org/p/project-zero/issues/attachment?aid=274560)
idSSV:93157
last seen2017-11-19
modified2017-05-27
published2017-05-27
reporterRoot
titleApple iOS / MacOS NSKeyedArchiver Heap Corruption(CVE-2017-2524)