Vulnerabilities > CVE-2017-2524 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH 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
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.
Exploit-Db
description | Apple iOS/macOS - NSKeyedArchiver Heap Corruption Due to Rounding Error in 'TIKeyboardLayout initWithCoder:'. CVE-2017-2524. Dos exploit for Multiple platform |
file | exploits/multiple/dos/42051.txt |
id | EDB-ID:42051 |
last seen | 2017-05-25 |
modified | 2017-05-23 |
platform | multiple |
port | |
published | 2017-05-23 |
reporter | Exploit-DB |
source | https://www.exploit-db.com/download/42051/ |
title | Apple iOS/macOS - NSKeyedArchiver Heap Corruption Due to Rounding Error in 'TIKeyboardLayout initWithCoder:' |
type | dos |
Nessus
NASL family Misc. NASL id APPLETV_10_2_1.NASL description 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 last seen 2020-06-01 modified 2020-06-02 plugin id 100256 published 2017-05-17 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100256 title Apple 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 family MacOS X Local Security Checks NASL id MACOSX_SECUPD_10_11_6_2017-002__10_10_5_2017-002.NASL description The 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 seen 2020-06-01 modified 2020-06-02 plugin id 100271 published 2017-05-18 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100271 title Mac OS X Multiple Vulnerabilities (Security Update 2017-002) NASL family MacOS X Local Security Checks NASL id MACOS_10_12_5.NASL description The 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 seen 2020-06-01 modified 2020-06-02 plugin id 100270 published 2017-05-18 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100270 title macOS 10.12.x < 10.12.5 Multiple Vulnerabilities
Seebug
bulletinFamily | exploit |
description | Using 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) |
id | SSV:93157 |
last seen | 2017-11-19 |
modified | 2017-05-27 |
published | 2017-05-27 |
reporter | Root |
title | Apple iOS / MacOS NSKeyedArchiver Heap Corruption(CVE-2017-2524) |
References
- http://www.securityfocus.com/bid/98468
- http://www.securityfocus.com/bid/98468
- http://www.securitytracker.com/id/1038484
- http://www.securitytracker.com/id/1038484
- https://support.apple.com/HT207797
- https://support.apple.com/HT207797
- https://support.apple.com/HT207798
- https://support.apple.com/HT207798
- https://support.apple.com/HT207800
- https://support.apple.com/HT207800
- https://support.apple.com/HT207801
- https://support.apple.com/HT207801
- https://www.exploit-db.com/exploits/42051/
- https://www.exploit-db.com/exploits/42051/